[L] Change in coreboot[master]: mb/asrock/b75m-itx: Add Sandy/Ivy Bridge board B75M-ITX

[Kevin Keijzer (Code Review)]

Attention is currently required from: Felix Singer, Angel Pons, Arthur Heymans, Nicholas Chin, Fabian Groffen, Elyes Haouas.

Kevin Keijzer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/73097 )

Change subject: mb/asrock/b75m-itx: Add Sandy/Ivy Bridge board B75M-ITX
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Patch Set 5: Code-Review+1

(1 comment)

Patchset:

PS5: 
One more addition: because the B75 Pro3-M port, on which this is based, lacks `cmos.default`, `cmos.layout` and `data.vbt`, those were missing from this port as well.

I've pushed the changes for the b75pro3-m in commit ac95089641b1, and this patchset incorporates them for the b75m-itx as well.

This pretty much completes it.