Change in coreboot[master]: mb/amd,google: use PAD_NF_SCI for GPIO_2 config in soc/amd based boards

[Martin Roth (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Furquan Shaikh, Marshall Dawson, Kyösti Mälkki, Felix Held.
Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51756 )

Change subject: mb/amd,google: use PAD_NF_SCI for GPIO_2 config in soc/amd based boards
......................................................................

Patch Set 3: Code-Review+2

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/51756/comment/ba0d0402_df0391e1 
PS1, Line 22: since S3 resume isn't working on amd/mandolin yet.
> seems OK = wake works using WAKE_L pin? Was that validated using `mosys eventlog list`?

We're building the production images for Zork from the firmware branch, so this won't affect that.  Everything looks reasonable and Marshall commented that morphius seems ok.  I'd recommend that we go ahead and merge the change.