[S] Change in coreboot[master]: mb/google/myst: Enable fingerprint on UART

[Martin Roth (Code Review)]

Attention is currently required from: Eric Lai, Jon Murphy, Karthik Ramasubramanian, Paul Menzel, Tim Van Patten.

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75629?usp=email )

Change subject: mb/google/myst: Enable fingerprint on UART
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Patch Set 3:

(1 comment)

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

https://review.coreboot.org/c/coreboot/+/75629/comment/125d35ae_340ffb36 :
PS3, Line 71: 	PAD_GPO(GPIO_40, LOW),
> Micheal said we should keep it low durning boot. You can check the chat.

If that actually adds a delay to the boot sequence, it's working directly against our boot time optimization. I think we need to design a method of switching GPIOs at appropriate times instead of using delays.

I don't think this question should hold up this patch though.