Change in coreboot[master]: src/soc/intel/cannonlake: Add _PRW for CNVi

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Change subject: src/soc/intel/cannonlake: Add _PRW for CNVi
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Patch Set 4: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/63968/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/18826/ : SUCCESS