Change in coreboot[master]: soc/amd/common/block/psp: Add platform secure boot support

[ritul guru (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, ritul guru, Marshall Dawson, Paul Menzel, Angel Pons, Felix Held.
Hello build bot (Jenkins), Jason Glenesk, Raul Rangel, Marshall Dawson, Aamir Bohra, Felix Held,

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

https://review.coreboot.org/c/coreboot/+/60968

to look at the new patch set (#11).

Change subject: soc/amd/common/block/psp: Add platform secure boot support
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soc/amd/common/block/psp: Add platform secure boot support

Add Platform Secure Boot (PSB) enablement via the PSP if it is not
already enabled. Upon receiving psb command, PSP will program PSB fuses
as long as BIOS signing key token is valid.

Change-Id: I30aac29a22a5800d5995a78c50fdecd660a3d4eb
Signed-off-by: Ritul Guru 
---
M src/soc/amd/common/block/psp/Kconfig
M src/soc/amd/common/block/psp/Makefile.inc
A 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
5 files changed, 238 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/68/60968/11