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

[Paul Menzel (Code Review)]

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

Paul Menzel 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 7:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/73097/comment/fe19b833_adb91256 
PS7, Line 9: This board is based off b75pro3-m, which is very similar.  Compared to
           : it, it just lacks a COM1 header, and the secondary ASMedia SATA3
           : controller.
If they are similar, why not make it a variant?

(This comment should not block submitting this change-set.)