[S] Change in coreboot[master]: soc/amd/stoneyridge: initialize GPIOs for serial console

[Felix Held (Code Review)]

Attention is currently required from: Matt DeVillier.

Hello Matt DeVillier,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/68533

to look at the new patch set (#3).

Change subject: soc/amd/stoneyridge: initialize GPIOs for serial console
......................................................................

soc/amd/stoneyridge: initialize GPIOs for serial console

Initialize the two GPIOs of the SoC UART if it's used for serial console
to be sure that the I/O mux is configured correctly without having to
rely on the bootblock_mainboard_early_init call to do this. This brings
Stoneyridge more in line with the other AMD SoCs. Since this code will
be factored out to the common AMD SoC code in a follow-up patch, the
function prototype is added to southbridge.h instead of creating a new
uart.h header file.

Signed-off-by: Felix Held 
Change-Id: Id4aa6734e63dad204d22ce962b983cde6e3abd62
---
M src/soc/amd/stoneyridge/early_fch.c
M src/soc/amd/stoneyridge/include/soc/southbridge.h
M src/soc/amd/stoneyridge/uart.c
3 files changed, 32 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/33/68533/3