Change in coreboot[master]: boardid: Add helpers to read sku_id strapping into coreboot tables

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Change subject: boardid: Add helpers to read sku_id strapping into coreboot tables
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Patch Set 4:

Build Successful

https://qa.coreboot.org/job/coreboot-gerrit/64240/ : SUCCESS

https://qa.coreboot.org/job/coreboot-checkpatch/19065/ : SUCCESS