Change in coreboot[master]: soc/intel/cannonlake: Add Pch iSCLK programming

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Change subject: soc/intel/cannonlake: Add Pch iSCLK programming
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Patch Set 11: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/67112/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/21676/ : SUCCESS