Change in coreboot[master]: soc/amd/common: Fix most checkpatch errors

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/20249 )

Change subject: soc/amd/common: Fix most checkpatch errors
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Patch Set 5: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/56210/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/11808/ : SUCCESS