Change in coreboot[master]: soc/intel/cannonlake: Add postcar stage support

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/20688 )

Change subject: soc/intel/cannonlake: Add postcar stage support
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Patch Set 2: Verified-1

Build Unstable

https://qa.coreboot.org/job/coreboot-gerrit/58065/ : UNSTABLE

https://qa.coreboot.org/job/coreboot-checkpatch/13498/ : SUCCESS