[M] Change in coreboot[master]: mb/google/skyrim/var/frostflow: Update devicetree setting

[Matt DeVillier (Code Review)]

Attention is currently required from: Frank Wu, Jason Nien, Kangheui Won, Isaac Lee, Jon Murphy, Martin Roth, Karthik Ramasubramanian.

Matt DeVillier has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68482 )

Change subject: mb/google/skyrim/var/frostflow: Update devicetree setting
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Patch Set 4:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/68482/comment/12bf29b6_5ab050a4 
PS3, Line 52: register "generic.probed" = "1"
> Matt is working on getting rid of this in the kernel. […]

we need to keep the probed flag for touchscreens on skyrim until CB:67778 is in (needs a re-review since I updated it). So keep for now and change all at once in CB:67779