[M] Change in coreboot[master]: mb/google/skyrim/var/winterhold: update thermal config

[EricKY Cheng (Code Review)]

Attention is currently required from: Dtrain Hsu, Jason Nien, Chris Wang, Martin Roth, Eric Peers, Karthikeyan Ramasubramanian.

EricKY Cheng has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68472 )

Change subject: mb/google/skyrim/var/winterhold: update thermal config
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Patch Set 31:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/68472/comment/6a1179e9_a0fcaba1 
PS31, Line 7: # Refer the spec "FT6 Infrastructure Roadmap"#57316
            : 	# Set system_configuration to 4 for 15W
            : 	register "system_configuration" = "4"
> Base on CB:69904, I found below are the same with baseboard settings. […]

Override these settings on this CL with thermal team specific project proposal and for further tuning.