[S] Change in coreboot[master]: mb/intel/mtlrvp: Remove GPP_A12 for chrome platform

[Harsha B R (Code Review)]

Attention is currently required from: Ravishankar Sarawadi, Sridhar Siricilla.

Harsha B R has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/72742 )

Change subject: mb/intel/mtlrvp: Remove GPP_A12 for chrome platform
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Patch Set 1:

(1 comment)

Patchset:

PS1:
> Interesting, since no one use it why it prevent the G3? Or real HW is connected to WLAN?

Yes, the WLAN is connected and the signal wrt GPP_A12 pin never turns the 1.8A rail low even though the system is at S5. At S5, since this is still active (which turns out to be a wake signal) at S5, DUT reboots.