[XS] Change in coreboot[main]: mb/asus/p8z77-m: Remove settings to replicate OEM

[Keith Hui (Code Review)]

Attention is currently required from: Fabian Groffen, Keith Hui.

Keith Hui has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75137?usp=email )

Change subject: mb/asus/p8z77-m: Remove settings to replicate OEM
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Patch Set 4:

(3 comments)

Patchset:

PS3:
> S3 suspend/resume has always worked in my scenario, I wonder if it works for you on the code current […]

I did have to change the coin cell on the board, so there was no battery on the board for a while. S3 still did not work for me.

File src/mainboard/asus/p8x7x-series/variants/p8z77-m/overridetree.cb:

https://review.coreboot.org/c/coreboot/+/75137/comment/d5ce514a_f6c8b6dd :
PS4, Line 30: 						drq 0x1a = 0x02
Can you test with these two settings (0x1a,0x1b) retained if serial port still work?

https://review.coreboot.org/c/coreboot/+/75137/comment/96a2502d_d5a22476 :
PS4, Line 32: 						drq 0x2c = 0x00		# GP27, 3VSBSW#, No TSI
This should stay. This is an Intel board, not AMD. We have no use for the SB-TSI interface this register controls.