[S] Change in coreboot[master]: mb/google/skyrim/var/frostflow: Set Package Power Parameters

[Frank Wu (Code Review)]

Attention is currently required from: John Su, Jason Nien, Matt DeVillier, Chris Wang, Martin Roth, Tim Van Patten.

Frank Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69565 )

Change subject: mb/google/skyrim/var/frostflow: Set Package Power Parameters
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Patch Set 4:

(1 comment)

File src/mainboard/google/skyrim/variants/frostflow/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/69565/comment/e2ec8ec9_90f28468 
PS4, Line 10: 	register "stapm_time_constant_s" = "200"
> `stapm_time_constant_s` is the only value that's different from `src/mainboard/google/skyrim/variant […]

Hi Tim,

The values are not defined in src/mainboard/google/skyrim/variants/baseboard/devicetree.cb.

In another project winterhold, it has configured the settings as well. 
IMO, they have to be configured in overridetree.cb for each variant.
Is that right?

Thank you very much.