mb/siemens/{mc_apl2,...,mc_apl6}: Do early UART pad configuration
With commit
405f229689 (soc/intel/*: drop UART pad configuration from
common code) the UART pad configuration was dropped from common SoC
code. Through a second commit
5ff17ed393 (mb/siemens/mc_apl1: do UART
pad configuration at board-level) the UART pad configuration was made
for mc_apl1 baseboard. This change is also needed for all other mc_apl
boards.
Change-Id: If78726d9b141e4e7580cca3267f49c1a5b95d7fa
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54911
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>