949b42c4dc
This allows us to communicate to the back-end that we don't actually know if the framebuffer is multisampled or not. No drivers set anything but ALWAYS/NEVER and we still have a few ALWAYS/NEVER assumptions but those should be asserted. Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21094>