[M] Change in coreboot[master]: payloads/edk2: Add an option to use EDK2 Universal Payload

[Sean Rhodes (Code Review)]

Attention is currently required from: Sean Rhodes, Martin L Roth, Stefan Reinauer.

Hello build bot (Jenkins), Martin L Roth, Stefan Reinauer,

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

https://review.coreboot.org/c/coreboot/+/65934

to look at the new patch set (#38).

Change subject: payloads/edk2: Add an option to use EDK2 Universal Payload
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payloads/edk2: Add an option to use EDK2 Universal Payload

This add's an option to use EDK2's Universal Payload, instead
of the standard UefiPayloadPkg. This is started via the ShimLayer,
which is added as the primary payload. The ShimLayer will build
the HOBs that Universal Payload requires and start it directly.

This is the reason that the Universal Payload is added to CBFS
as a raw file.

Universal Payload is based on Intel's USF specification:
https://universalscalablefirmware.github.io/documentation/

This has been added with the repository pointing to
https://github.com/starlabsltd. The required ShimLayer patches
will be merged into master, only when this patch is merged.

This is because the EDK2 engineers believe it is an impossible
task to patch coreboot to build and use Universal Payload.

Signed-off-by: Sean Rhodes 
Change-Id: I17cc86d5eac0d5d91551ba5bea73fbc07ebdf0d3
---
M payloads/external/edk2/Kconfig
1 file changed, 56 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/34/65934/38