swr: Don't report support for shader images.

gallivm has images support, but this driver doesn't.

Cc: mesa-stable (for the upcoming shader image leak fix)
Acked-by: Jan Zielinski <jan.zielinski@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8530>
(cherry picked from commit 9445c3d59ff25e61e94f3fa888dd2ac16126b4ce)
2 files changed