[M] Change in coreboot[main]: mb/asus/p8z77-v: Attempt to correctly route PCIe lanes

[Keith Hui (Code Review)]

Attention is currently required from: Angel Pons, Bill XIE, Nicholas Chin.

Keith Hui has posted comments on this change by Keith Hui. ( https://review.coreboot.org/c/coreboot/+/85413?usp=email )

Change subject: mb/asus/p8z77-v: Attempt to correctly route PCIe lanes
......................................................................

Patch Set 6:

(1 comment)

Patchset:

PS6:
> > Since which patch set did it start to fail? […]

Which really carries the key fix. I'll need to see a console log again with latest patch set and PS 4 if you can.

I cannot reproduce from my end, because on my P8Z77-V LE+ it's a PCH GPIO that's doing the job, and my Sabertooth suffered trace damage and is a bust.