[S] Change in coreboot[main]: Update opensbi submodule to upstream master branch

[ron minnich (Code Review)]

Attention is currently required from: Martin L Roth, Maximilian Brune, Philipp Hug.

ron minnich has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/81543?usp=email )

Change subject: Update opensbi submodule to upstream master branch
......................................................................

Patch Set 4:

(1 comment)

Patchset:

PS4:
> Yes that is the requirement I was talking about. […]

yes, a range pmp would cover that just fine. But coreboot is also wrong about the requirements on opensbi now -- sbi can relocate itself. So I need to first submit another PR for coreboot to remove the check on the definition of OPENSBI