Change in coreboot[master]: mb/google/*: Use newly added Chrome EC boardid function

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Change subject: mb/google/*: Use newly added Chrome EC boardid function
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Patch Set 3: Verified+1

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/61115/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/16283/ : SUCCESS