Change in coreboot[master]: mb/asus/p8x7x: Turn P8Z77-M PRO into a variant of P8x7x baseboard

[Angel Pons (Code Review)]

Attention is currently required from: Bill XIE.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/54335 )

Change subject: mb/asus/p8x7x: Turn P8Z77-M PRO into a variant of P8x7x baseboard
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Patch Set 3:

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/54335/comment/cb5de1e6_28693718 
PS3, Line 7: mb/asus/p8x7x: Turn P8Z77-M PRO into a variant of P8x7x baseboard
Is this verified in any way? I don't think so, which is why I made this patch series: https://review.coreboot.org/q/topic:%22unify-asus-p8z77-boards%22+status:ope...

I'd *much* prefer my approach over this. The commits in this patch train are either reproducible (coreboot.rom is identical before and after) or very small and easy to review.

https://review.coreboot.org/c/coreboot/+/54335/comment/122f2477_e752cc0d 
PS3, Line 11: MAINBOARD_HAS_TPM1 should not be selected, since the module is
This change deserves a separate commit.