[S] Change in coreboot[main]: soc/intel/xeon_sp: Add domain role checking utils

[Shuo Liu (Code Review)]

Attention is currently required from: Arthur Heymans, Christian Walter, Johnny Lin, Lean Sheng Tan, Patrick Rudolph, Tim Chu.

Shuo Liu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81046?usp=email )

Change subject: soc/intel/xeon_sp: Add domain role checking utils
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Patch Set 4:

This change is ready for review.