[M] Change in coreboot[master]: src/mainboard/brya/: Clear EC AP_IDLE flag after shutdown

[Subrata Banik (Code Review)]

Attention is currently required from: Tarun Tuli, Derek Huang, Caveh Jalali, Nick Vaccaro, Daisuke Nojiri, Boris Mittelberg.

Subrata Banik has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70773 )

Change subject: src/mainboard/brya/: Clear EC AP_IDLE flag after shutdown
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Patch Set 9:

(1 comment)

Patchset:

PS9: 
looking at the variant.c files, I felt the implementation is copied across (isn't it)?

Instead, I would recommend introducing a Kconfig like CLEAR_EC_AP_IDLE_FLAG and perform the required operations inside the mainboard.c file alone. The target chrombox designs would only select CLEAR_EC_AP_IDLE_FLAG. This will ensure the changes only impact the chromebox and brya/nissa/skolas are not getting impacted.