[M] Change in coreboot[master]: mb/asrock/b75pro3-m: Add CMOS layout/defaults and vbt.bin

[Paul Menzel (Code Review)]

Attention is currently required from: Kevin Keijzer.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/73451 )

Change subject: mb/asrock/b75pro3-m: Add CMOS layout/defaults and vbt.bin
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Patch Set 2: Code-Review+1

(5 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/73451/comment/9cd05163_d5e627cd 
PS2, Line 9: was lacking
It’d use present tense to describe the current situation: lacks.

https://review.coreboot.org/c/coreboot/+/73451/comment/d2e93963_6cb8a8ef 
PS2, Line 10: could not
Ditto.

https://review.coreboot.org/c/coreboot/+/73451/comment/6afd23eb_2d8d064a 
PS2, Line 13: I have "borrowed" the files from the similar h77pro4-m port, which
            : work fine for the b75pro3-m. I can now adjust things like gfx_uma_size
            : and power_on_after_fail, which are quite useful to be able to modify.
I’d write: Borrow the files from …. Now it’s possible to adjust ….

https://review.coreboot.org/c/coreboot/+/73451/comment/505a8154_1b69b47a 
PS2, Line 18: VGABIOS
Which version.

Patchset:

PS2: 
Thank you for this improvements. I only have some commit message nit picks.