Change in coreboot[master]: src/cpu/amd/atrr/amd_mtrr.c Fix checkpatch errors + warnings

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Change subject: src/cpu/amd/atrr/amd_mtrr.c Fix checkpatch errors + warnings
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/10798/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/55118/ : SUCCESS