Enable the console UART for myst devices.
Bug=b:275900837
TEST=builds
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Change-Id: I52c1b86c46907216d88f98917968b833af0d5d41
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74103
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Tim Van Patten <timvp@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>