[coreboot-gerrit] Change in coreboot[master]: cpu/amd/pi Fix checkpatch warnings and errors

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Change subject: cpu/amd/pi Fix checkpatch warnings and errors
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/57908/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/13353/ : SUCCESS