Change in coreboot[master]: mainboard/google/zoombini: Provide memory configuration variant API

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/22205 )

Change subject: mainboard/google/zoombini: Provide memory configuration variant API
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Patch Set 19: Verified-1

Build Unstable

https://qa.coreboot.org/job/coreboot-gerrit/63861/ : UNSTABLE

https://qa.coreboot.org/job/coreboot-checkpatch/18729/ : SUCCESS