Change in coreboot[master]: soc/intel/{common, apollolake}: fix coverity issues

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Change subject: soc/intel/{common,apollolake}: fix coverity issues
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Patch Set 1: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/61555/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/16668/ : SUCCESS