panfrost: Fix faults on block-based formats on Bifrost

Fixes

dEQP-GLES2.functional.texture.filtering.2d.nearest_nearest_clamp_etc1

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7081>
1 file changed