Change in coreboot[master]: mb/google/brya/var/volmar: Disable thunderbolt

[Ren Kuo (Code Review)]

Attention is currently required from: David Wu, Tim Wawrzynczak, Ren Kuo, Nick Vaccaro.
Ren Kuo has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62810 )

Change subject: mb/google/brya/var/volmar: Disable thunderbolt
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Patch Set 3:

(4 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62810/comment/11f6f8dc_fea40fa8 
PS2, Line 9: Disable thunderbolot(TBT) pcie for volmar.
> Can just say something like […]

updated.

https://review.coreboot.org/c/coreboot/+/62810/comment/cb7a8f55_4743f4d0 
PS2, Line 9: thunderbolot
> `Thunderbolt`

updated.

Patchset:

PS2:
> I think dma0/1 should be disabled as well.

updated.

File src/mainboard/google/brya/variants/volmar/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/62810/comment/1062fdd0_e8168ca7 
PS2, Line 91:
> Probably also need to disable […]

updated.