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

[Jon Murphy (Code Review)]

Attention is currently required from: Raul Rangel, Tim Van Patten, Karthik Ramasubramanian, Mark Hasemeyer.

Jon Murphy 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:

(3 comments)

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

https://review.coreboot.org/c/coreboot/+/74095/comment/1c6087f3_85a84e7e 
PS7, Line 60: HIGH)
> Active High. So please leave it as LOW.
> Done

https://review.coreboot.org/c/coreboot/+/74095/comment/0bb73a4a_66b54522 
PS7, Line 64: HIGH
> Active High. So please leave it as LOW.
> Done

https://review.coreboot.org/c/coreboot/+/74095/comment/12f3cc69_2d51c1b1 
PS7, Line 75: 	/* SOC_MEM_VID_C1 */
            : 	PAD_GPI(GPIO_42, PULL_NONE),
> This should also be configured by SMU and not touched by coreboot.
> Done