Change in coreboot[master]: mb/google/guybrush: Define ACPI Power Resources for FPMCU

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Raul Rangel, Rob Barnes, Felix Held.
Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58705 )

Change subject: mb/google/guybrush: Define ACPI Power Resources for FPMCU
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Patch Set 4:

(1 comment)

File src/mainboard/google/guybrush/variants/guybrush/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/58705/comment/5d99e02d_6117bf39 
PS4, Line 178: enable_delay_ms
> Actually, do we also want enable_off_delay_ms = 200?

We are actually configuring the enable GPIO to TX state '0' (i.e. disable) in ramstage. The GPIO gets set to enabled state when the control jumps to OS. That will help to meet the enable_off_delay_ms requirement.

I did this because _OFF method does not get invoked during shutdown or warm reset.