Re-organize source

After removing i2c support, we can reduce the depth of the source
code and remove the power-control-x86 folder.

We can also simplify the CMake files.

Tested:
Confirmed that ipmi

Re-organize source

After removing i2c support, we can reduce the depth of the source
code and remove the power-control-x86 folder.

We can also simplify the CMake files.

Tested:
Confirmed that ipmi power control commands all still work correctly.

Change-Id: I67104e40555d4d84c2b946fad000e3a541828272
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>

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