[coreboot-gerrit] Change in coreboot[master]: documentation: Add documentation on setting up mainboard GPIOs

[Nico Huber (Code Review)]

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/37802 )

Change subject: documentation: Add documentation on setting up mainboard GPIOs
......................................................................

Patch Set 2:

Shouldn't we call it "pin" or "pad" configuration? I know, in
coreboot we still refer to it as GPIO config. But it might
confuse new people that expect this to be about dedicated GPIO
pins.

Also, GPIO is sometimes confused with pins available to the
platform user, while in coreboot it's mostly about pins controlled
by the firmware.