[S] Change in coreboot[main]: soc/amd/common/psp_gen2: return status from soc_read_c2p38

[Felix Held (Code Review)]

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

Hello Fred Reitberger, Jason Glenesk, Matt DeVillier, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/83447?usp=email

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

The following approvals got outdated and were removed:
Verified-1 by build bot (Jenkins)

Change subject: soc/amd/common/psp_gen2: return status from soc_read_c2p38
......................................................................

soc/amd/common/psp_gen2: return status from soc_read_c2p38

This sort-of reverts commit 00ec1b9fc7ba ("soc/amd/common/block/psp/
psp_gen2: simplify soc_read_c2p38") and is done as a preparation to
switch back to using the MMIO access to the PSP mailbox registers.

Signed-off-by: Felix Held 
Change-Id: Icca3c7832295ae9932778f6a64c493e474dad507
---
M src/soc/amd/common/block/psp/psb.c
M src/soc/amd/common/block/psp/psp_def.h
M src/soc/amd/common/block/psp/psp_gen2.c
M src/soc/amd/common/block/psp/spl_fuse.c
4 files changed, 15 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/47/83447/3