panfrost: Call util_blitter_save_fragment_constant_buffer_slot

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5858>
diff --git a/src/gallium/drivers/panfrost/pan_blit.c b/src/gallium/drivers/panfrost/pan_blit.c
index 6361e7c..420f85c 100644
--- a/src/gallium/drivers/panfrost/pan_blit.c
+++ b/src/gallium/drivers/panfrost/pan_blit.c
@@ -57,6 +57,8 @@
         util_blitter_save_fragment_sampler_views(blitter,
                         ctx->sampler_view_count[PIPE_SHADER_FRAGMENT],
                         (struct pipe_sampler_view **)&ctx->sampler_views[PIPE_SHADER_FRAGMENT]);
+        util_blitter_save_fragment_constant_buffer_slot(blitter,
+                        ctx->constant_buffer[PIPE_SHADER_FRAGMENT].cb);
 }
 
 static bool