Change in coreboot[master]: soc/intel/{cannonlake, skylake}: Add _soc_ prefix in spi soc routine

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Change subject: soc/intel/{cannonlake,skylake}: Add _soc_ prefix in spi soc routine
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/18119/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/63178/ : SUCCESS