Change in coreboot[master]: soc/intel/cannonlake: provide common LPDDR4 memory init

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Change subject: soc/intel/cannonlake: provide common LPDDR4 memory init
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Patch Set 7: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/17762/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/62761/ : SUCCESS