[coreboot-gerrit] Change in coreboot[master]: mb/google/brya: Add FPMCU power control

[EricR Lai (Code Review)]

Attention is currently required from: Tim Wawrzynczak.
EricR Lai has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52185 )

Change subject: mb/google/brya: Add FPMCU power control
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Patch Set 1:

(1 comment)

File src/mainboard/google/brya/variants/brya0/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/52185/comment/83048251_cb529119 
PS1, Line 196: register "has_power_resource" = "1"
> This won't work right now, b/c this will generate a power resource which will let the kernel put the […]

If we just need D0, _INI is good to use. But I am think either EC control this or we can use HW to do this since it only need 3ms delay. Totally can do it by add the CAP.