Change in coreboot[master]: mb/google/guybrush/var/guybrush: Add FPMCU configration

[Furquan Shaikh (Code Review)]

Attention is currently required from: Bhanu Prakash Maiya, Ivy Jian, EricR Lai.
Furquan Shaikh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52181 )

Change subject: mb/google/guybrush/var/guybrush: Add FPMCU configration
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Patch Set 9:

(1 comment)

Patchset:

PS9:
> oh, I think _INI is prefect since it only called once? _PS0 will be called when back from S3.

Even if we call it in _INI, we are going to need to handle the coreboot S3 resume case gracefully. See my suggestion on https://review.coreboot.org/c/coreboot/+/52181/comment/7357ab3f_150a962b/