[M] Change in coreboot[master]: mb/google/myst: First pass GPIO configuration for Myst

[Karthik Ramasubramanian (Code Review)]

Attention is currently required from: Raul Rangel, Jon Murphy, Tim Van Patten, Mark Hasemeyer.

Karthik Ramasubramanian has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74095 )

Change subject: mb/google/myst: First pass GPIO configuration for Myst
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Patch Set 7:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/74095/comment/3fe02fb7_b3c17b35 
PS7, Line 30: 	/* Unused */
            : 	PAD_NC(GPIO_10),
Coreboot should not touch it. This is handled by SMU and should be left as is.