[M] Change in coreboot[master]: soc|vc/amd/phoenix: Prepare for PSP verstage

[Martin Roth (Code Review)]

Attention is currently required from: Felix Held, Fred Reitberger, Jason Glenesk, Jon Murphy, Karthik Ramasubramanian, Matt DeVillier, Raul Rangel, Tim Van Patten.

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/75584?usp=email )

Change subject: soc|vc/amd/phoenix: Prepare for PSP verstage
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Patch Set 1:

(2 comments)

File src/soc/amd/phoenix/psp_verstage/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/75584/comment/3b91c1af_4f62ee48 :
PS1, Line 3: ifeq ($(CONFIG_VBOOT_STARTS_BEFORE_BOOTBLOCK),y)
> `src/soc/amd/mendocino/psp_verstage/Makefile.inc` is slightly different than this. […]

vboot_separate_verstage can also run on the x86, and we don't want this included there.

VBOOT_STARTS_BEFORE_BOOTBLOCK really means PSP_verstage, it was just requested not to call it PSP_verstage in Kconfig when the feature was introduced.

File src/vendorcode/amd/fsp/phoenix/include/bl_uapp/bl_errorcodes_public.h:

https://review.coreboot.org/c/coreboot/+/75584/comment/6edd2161_2c64cc5d :
PS1, Line 1: *
Use the version in vendorcode/amd/fsp/common/bl_uapp instead?