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H A Dcacheinfo.cd4ec840b Mon Jul 04 05:15:46 CDT 2022 Sudeep Holla <sudeep.holla@arm.com> cacheinfo: Use of_cpu_device_node_get instead cpu_dev->of_node

The of_cpu_device_node_get takes care of fetching the CPU'd device node
either from cached cpu_dev->of_node if cpu_dev is initialised or uses
of_get_cpu_node to parse and fetch node if cpu_dev isn't available yet.

Just use of_cpu_device_node_get instead of getting the cpu device first
and then using cpu_dev->of_node for two reasons:
1. There is no other use of cpu_dev and can be simplified
2. It enabled the use detect_cache_attributes and hence cache_setup_of_node
much earlier before the CPUs are registered as devices.

Link: https://lore.kernel.org/r/20220704101605.1318280-3-sudeep.holla@arm.com
Tested-by: Ionela Voinescu <ionela.voinescu@arm.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>