[XL] Change in coreboot[main]: vendorcode/amd: Add opensil code

[Martin Roth (Code Review)]

Attention is currently required from: Arthur Heymans, Varshit Pandya.

Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/76510?usp=email )

Change subject: vendorcode/amd: Add opensil code
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Patch Set 4:

(1 comment)

Patchset:

PS4:
> > Instead of copying all of opensil into the coreboot repo, could we make it a submodule? […]

Agreed - My thought is to create a repo at coreboot.org based on your changes. We can use both your repo and the opensil/opensil github repos as remotes and just pull to different branches. From there, we can cherry-pick changes from either, or even commit new patches as needed by coreboot.

We'd then use that repo as the submodule. I was thinking we'd place it in src/vendorcode/amd/opensil/genoa/openSIL so that the coreboot Kconfigs and makefiles for it live in vc/amd/opensil/genoa and could be maintained at coreboot.org instead of in the opensil repo itself.

I got preliminary buy in from the coreboot team at AMD, so I'm going to push some patches that will handle a submodule in that location before I actually create the submodule.