[S] Change in coreboot[master]: mb/google/skyrim: Add support for and select CONFIG_VBIOS_CACHE_IN_FMAP

[Martin L Roth (Code Review)]

Attention is currently required from: Jason Nien, Matt DeVillier, Martin Roth.

Martin L Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/70900 )

Change subject: mb/google/skyrim: Add support for and select CONFIG_VBIOS_CACHE_IN_FMAP
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Patch Set 8:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/70900/comment/3753035e_a418f071 
PS1, Line 15:
> We should add a depends_on here for a chromeos change to disable the saved psp_verstage. […]

The signed verstage has been removed from chromeos for now, so we can merge this when everything else is ready.

File src/mainboard/google/skyrim/Kconfig:

https://review.coreboot.org/c/coreboot/+/70900/comment/a6a79452_16df211e 
PS8, Line 108: VBIOS_CACHE_IN_FMAP
Is there any reason we shouldn't just select this, since the cache region actually *is* in the FMAP after this change?  if this isn't just saying that the FMAP has the VBIOS_CACHE region, maybe change this to USE_VBIOS_CACHE_IN_FMAP?