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

[Derek Huang (Code Review)]

Attention is currently required from: Tarun Tuli, Subrata Banik, Caveh Jalali, Nick Vaccaro, Daisuke Nojiri, Eric Lai, Boris Mittelberg.

Derek Huang 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 11:

(1 comment)

File src/mainboard/google/brya/mainboard.c:

https://review.coreboot.org/c/coreboot/+/70773/comment/d692ecc5_e236bf36 
PS11, Line 219: 	if (CONFIG(CR50_RESET_CLEAR_EC_AP_IDLE_FLAG)) {
> I think you can add in here https://source.chromium. […]

It is required for all Chromebox/base if POWER_OFF_ON_CR50_UPDATE is enabled, so I prefer to add it in https://source.chromium.org/chromiumos/chromiumos/codesearch/+/main:src/thir...