[XS] Change in coreboot[main]: Revert "nipperkin: Fix WLAN to GEN2 speed" & "Disable PSPP for WLAN"

[Tim Van Patten (Code Review)]

Attention is currently required from: Bao Zheng, Felix Held, Jason Nien, Martin Roth, Zheng Bao.

Tim Van Patten has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79172?usp=email )

Change subject: Revert "nipperkin: Fix WLAN to GEN2 speed" & "Disable PSPP for WLAN"
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Patch Set 2:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/79172/comment/50135eb3_b986cd00 :
PS2, Line 22: 
What testing has been done for this?

The original bug that landed these changes was: b/228830362: Nipperkin: Hang during S0i3 resume due to WLAN PSPP. The CLs that this is reverting did:

1. `TEST=Suspend stress test passes on Nipperkin`
2. `TEST=suspend_stress_test on AC and DC`

I think this should do the same before landing.