[S] Change in coreboot[master]: src/ec/intel: Create common code for board_id implementation

[Usha P (Code Review)]

Attention is currently required from: Martin L Roth, Subrata Banik, Harsha B R, Rizwan Qureshi, Krishna P Bhat D.

Usha P has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70227 )

Change subject: src/ec/intel: Create common code for board_id implementation
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Patch Set 5: Code-Review+2