[M] Change in coreboot[master]: mb/google/myst: Add stubs to configure GPIOs

[Jon Murphy (Code Review)]

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

Hello build bot (Jenkins), Raul Rangel, Tim Van Patten, Karthik Ramasubramanian, Mark Hasemeyer,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/74094

to look at the new patch set (#10).

Change subject: mb/google/myst: Add stubs to configure GPIOs
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mb/google/myst: Add stubs to configure GPIOs

Add configuration stubs for GPIOs to be implemented later.

BUG=b:270596581
TEST=builds

Signed-off-by: Jon Murphy 
Change-Id: I3228f857da7c8c76cf32faf4a23418aedaf40875
---
M src/mainboard/google/myst/bootblock.c
M src/mainboard/google/myst/mainboard.c
A src/mainboard/google/myst/variants/baseboard/Makefile.inc
A src/mainboard/google/myst/variants/baseboard/gpio.c
A src/mainboard/google/myst/variants/baseboard/include/baseboard/gpio.h
M src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h
6 files changed, 94 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/94/74094/10