panfrost: Destroy the upload manager allocated in panfrost_create_context()

pipe->stream_uploader has been allocated with u_upload_create_default()
in panfrost_create_context(), let's destroy it in the context destroy
path.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>

src/gallium/drivers/panfrost/pan_context.c

@@ -2448,6 +2448,8 @@ panfrost_destroy(struct pipe_context *pipe)
         if (panfrost->blitter_wallpaper)
                 util_blitter_destroy(panfrost->blitter_wallpaper);
 
+        u_upload_destroy(pipe->stream_uploader);
+
         ralloc_free(pipe);
 }