Based on the public datasheet of NCT6686 which should be similar to
NCT6687D.
TEST=Enable serial for debugging on MSI PRO Z690-A WIFI DDR4 and see
coreboot console on the debug port
Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: I0e8744b5958af196de3de63de31852029d81436e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63462
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
7e3159c3d2