[XS] Change in coreboot[main]: soc/intel/xeon_sp: Handle GPIO SMIs

[Christian Walter (Code Review)]

Attention is currently required from: Alicja Michalska, Arthur Heymans, Johnny Lin, Jonathan Zhang, Lean Sheng Tan, Patrick Rudolph, Shuo Liu, Tim Chu.

Christian Walter has posted comments on this change by Alicja Michalska. ( https://review.coreboot.org/c/coreboot/+/84301?usp=email )

Change subject: soc/intel/xeon_sp: Handle GPIO SMIs
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Patch Set 1: Code-Review+2