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

[Furquan Shaikh (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Martin Roth, Marshall Dawson, Kyösti Mälkki, Felix Held.
Furquan Shaikh 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
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Patch Set 1: Code-Review+1

(2 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/51756/comment/21b7f1ba_4d7691e6 
PS1, Line 22: since S3 resume isn't working on amd/mandolin yet.
I think we should ensure that this change does not break the wake functionality as well. Can you please ensure this gets tested on a zork device if mandolin cannot be used?

File src/mainboard/google/guybrush/variants/baseboard/gpio.c:

https://review.coreboot.org/c/coreboot/+/51756/comment/8be5cb05_749f090b 
PS1, Line 14: , SCI
For the Google mainboards, the comment on top of the GPIO configuration refers to the netname.