Change in coreboot[master]: soc/intel/skylake: Add support in SKL for PMC common code

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Change subject: soc/intel/skylake: Add support in SKL for PMC common code
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Patch Set 28:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/61576/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/16685/ : SUCCESS