Switching was done by moving a SIO configuration and
the clocks setup from 'romstage.c' to 'bootblock.c',
following the example of change CB:37719 (fc749b2).
TEST=Boots into Artix Linux 2019 without a problem.
Signed-off-by: Mike Banon <mikebdp2@gmail.com>
Change-Id: I780fa87cb9cb3c45844c388331ef89eb8eb70ebb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37829
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>