Change in coreboot[master]: mb/google/deltaur: add deltaur mainboard initial support

[Selma Bensaid (Code Review)]

Selma Bensaid has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/39502 )

Change subject: mb/google/deltaur: add deltaur mainboard initial support
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Patch Set 5:

(1 comment)

https://review.coreboot.org/c/coreboot/+/39502/5/src/mainboard/google/deltau... 
File src/mainboard/google/deltaur/chromeos.fmd:

https://review.coreboot.org/c/coreboot/+/39502/5/src/mainboard/google/deltau... 
PS5, Line 4: 		SI_EC@0x1000 0x100000
> we need SI_GBE

We have a separate set of patches for enabling GBE.