[S] Change in coreboot[master]: soc/amd/picasso: add mb_pre_fspm() definition and weak implementation

[Matt DeVillier (Code Review)]

Attention is currently required from: Jason Glenesk, Matt DeVillier, Fred Reitberger, Felix Held.

Hello build bot (Jenkins), Jason Glenesk, Jason Glenesk, Angel Pons, Martin Roth, Fred Reitberger, Felix Held,

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

https://review.coreboot.org/c/coreboot/+/69452

to look at the new patch set (#2).

Change subject: soc/amd/picasso: add mb_pre_fspm() definition and weak implementation
......................................................................

soc/amd/picasso: add mb_pre_fspm() definition and weak implementation

On newer AMD platforms, mb_pre_fspm() is used to set GPIOs in romstage
for PCIe reset (currently set in bootblock) and touchscreen power
sequencing (not yet implemented, but will be later in the patch train).

Change-Id: Ia422aaa9e80355f9a9f8f850368441e5c8ff6598
Signed-off-by: Matt DeVillier 
---
M src/soc/amd/picasso/fsp_m_params.c
M src/soc/amd/picasso/include/soc/platform_descriptors.h
2 files changed, 20 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/52/69452/2