The generic PCH code already enables a superset of LPC decoding. Move
UART setup to bootblock_mainboard_early_init() where it is expected.
Last but not least, remove an odd write to BUCs (RCBA+0x3414) and
beyond, as it's an 8-bit register and shouldn't be bluntly zeroed.
Change-Id: I24a4ccf6a529460a83f48522d2e05e6ad6614f81
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36888
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
ce20697513