Change in coreboot[master]: mb/google/guybrush/var/dewatt: disable unused PCIe clock setting

[Paul Menzel (Code Review)]

Attention is currently required from: Kenneth Chan, Karthik Ramasubramanian.
Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/60328 )

Change subject: mb/google/guybrush/var/dewatt: disable unused PCIe clock setting
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/60328/comment/88f70567_86fb3262 
PS1, Line 9: Disable unused PCIe GPP_CLK1 and GPP_CLK2 for dewatt.
> For correctness, unused with dewatt chematics.

Done