mb/google/rambi: Disable console output by default
Disable SoC serial output by default, since no production devices
have this exposed, but leave it as a user option so it can be selected
as needed (eg, for use with a Google debug servo).
Same change as made for google/cyan in CB:39872
Change-Id: Id6b2c28658aca03d8c5042d719a0f6f504c29288
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39997
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>