i2c-vr: add support for MPS MP297X VR firmware update over I2C

This commit introduces support for programming MPS MP297X VR devices
over the I2C bus. It enables firmware updates for VR models such a

i2c-vr: add support for MPS MP297X VR firmware update over I2C

This commit introduces support for programming MPS MP297X VR devices
over the I2C bus. It enables firmware updates for VR models such as
MP2971 and MP2973.
Support for the MP297XFirmware type in EM was added in [1].

[1] https://gerrit.openbmc.org/c/openbmc/entity-manager/+/82949

Tested on the Santabarbara platform:

1. Display the fw inventory
```
curl --silent $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory",
"@odata.type": "#SoftwareInventoryCollection.SoftwareInventoryCollection",
"Members": [
{...},
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_8614"
},
{...}
],
"Members@odata.count": 15,
"Name": "Software Inventory Collection"
}
```

2. Query version.
```
curl $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_8614
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_8614",
"@odata.type": "#SoftwareInventory.v1_1_0.SoftwareInventory",
"Description": "Unknown image",
"Id": "Santabarbara_MB_VR_PEX0_8614",
"Name": "Software Inventory",
"Status": {
"Health": "OK",
"HealthRollup": "OK",
"State": "Enabled"
},
"Updateable": true,
"Version": "30EA058B"
}
```

3. Trigger the fw update via redfish.
```
curl -k ${creds} \
-H "Content-Type:multipart/form-data" \
-X POST \
-F UpdateParameters="{\"Targets\":[\"/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_8614\"],\"@Redfish.OperationApplyTime\":\"OnReset\"};type=application/json" \
-F "UpdateFile=@${fwpath};type=application/octet-stream" \
https://${bmc}/redfish/v1/UpdateService/update-multipart
```

4. Task is returned
```
{
"@odata.id": "/redfish/v1/TaskService/Tasks/1",
"@odata.type": "#Task.v1_4_3.Task",
"HidePayload": false,
"Id": "1",
"Messages": [
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has started.",
"MessageArgs": [
"1"
],
"MessageId": "TaskEvent.1.0.TaskStarted",
"MessageSeverity": "OK",
"Resolution": "None."
}
],
"Name": "Task 1",
"Payload": {
"HttpHeaders": [],
"HttpOperation": "POST",
"TargetUri": "/redfish/v1/UpdateService/update-multipart"
},
"PercentComplete": 0,
"StartTime": "2025-08-20T01:51:20+00:00",
"TaskMonitor": "/redfish/v1/TaskService/TaskMonitors/1",
"TaskState": "Running",
"TaskStatus": "OK"
}
```

5. Query Task status
```
curl --silent $creds https://$bmc/redfish/v1/TaskService/Tasks/1
```

```
{
"@odata.id": "/redfish/v1/TaskService/Tasks/1",
"@odata.type": "#Task.v1_4_3.Task",
"EndTime": "2025-08-20T01:51:24+00:00",
"HidePayload": false,
"Id": "1",
"Messages": [
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has started.",
"MessageArgs": [
"1"
],
"MessageId": "TaskEvent.1.0.TaskStarted",
"MessageSeverity": "OK",
"Resolution": "None."
},
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has changed to progress 50 percent complete.",
"MessageArgs": [
"1",
"50"
],
"MessageId": "TaskEvent.1.0.TaskProgressChanged",
"MessageSeverity": "OK",
"Resolution": "None."
},
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has changed to progress 80 percent complete.",
"MessageArgs": [
"1",
"80"
],
"MessageId": "TaskEvent.1.0.TaskProgressChanged",
"MessageSeverity": "OK",
"Resolution": "None."
},
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has changed to progress 100 percent complete.",
"MessageArgs": [
"1",
"100"
],
"MessageId": "TaskEvent.1.0.TaskProgressChanged",
"MessageSeverity": "OK",
"Resolution": "None."
},
{
"@odata.type": "#Message.v1_1_1.Message",
"Message": "The task with Id '1' has completed.",
"MessageArgs": [
"1"
],
"MessageId": "TaskEvent.1.0.TaskCompletedOK",
"MessageSeverity": "OK",
"Resolution": "None."
}
],
"Name": "Task 1",
"Payload": {
"HttpHeaders": [],
"HttpOperation": "POST",
"JsonBody": "null",
"TargetUri": "/redfish/v1/UpdateService/update-multipart"
},
"PercentComplete": 100,
"StartTime": "2025-08-20T01:51:20+00:00",
"TaskMonitor": "/redfish/v1/TaskService/TaskMonitors/1",
"TaskState": "Completed",
"TaskStatus": "OK"
}
```

6. Display the fw inventory with newly updated fw.
```
curl --silent $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory",
"@odata.type": "#SoftwareInventoryCollection.SoftwareInventoryCollection",
"Members": [
{...},
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_272"
},
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_8614"
},
{...}
],
"Members@odata.count": 16,
"Name": "Software Inventory Collection"
}
```

7. Query the new fw version.
```
curl $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_272
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_272",
"@odata.type": "#SoftwareInventory.v1_1_0.SoftwareInventory",
"Description": "Unknown image",
"Id": "Santabarbara_MB_VR_PEX0_272",
"Name": "Software Inventory",
"Status": {
"Health": "OK",
"HealthRollup": "OK",
"State": "Enabled"
},
"Updateable": false,
"Version": "E68829FD"
}
```

8. Do AC cycle to make sure the new fw is applied.
```
busctl set-property xyz.openbmc_project.State.Chassis0 /xyz/openbmc_project/state/chassis0 \
xyz.openbmc_project.State.Chassis RequestedPowerTransition s xyz.openbmc_project.State.Chassis.Transition.PowerCycle
```

9. Display the fw inventory after AC cycle.
```
curl --silent $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory",
"@odata.type": "#SoftwareInventoryCollection.SoftwareInventoryCollection",
"Members": [
{...},
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_3790"
},
{...}
],
"Members@odata.count": 15,
"Name": "Software Inventory Collection"
}
```

10. Query the fw version after AC cycle.
```
curl $creds https://$bmc/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_3790
```

```
{
"@odata.id": "/redfish/v1/UpdateService/FirmwareInventory/Santabarbara_MB_VR_PEX0_3790",
"@odata.type": "#SoftwareInventory.v1_1_0.SoftwareInventory",
"Description": "Unknown image",
"Id": "Santabarbara_MB_VR_PEX0_3790",
"Name": "Software Inventory",
"Status": {
"Health": "OK",
"HealthRollup": "OK",
"State": "Enabled"
},
"Updateable": true,
"Version": "E68829FD"
}
```

Change-Id: I0162bf6335ec673dd8c2a1cfb358c4c2a010570e
Signed-off-by: Kevin Tung <kevin.tung.openbmc@gmail.com>

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