dri_drawable: missing header

dri_util.h must be included in dri_drawable.h for __DRI* types and
driDrawPriv to be defined.

Signed-off-by: Eleni Maria Stea <elene.mst@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14334>

src/gallium/frontends/dri/dri_drawable.h

@@ -31,6 +31,7 @@
 #include "pipe/p_compiler.h"
 #include "pipe/p_format.h"
 #include "frontend/api.h"
+#include "dri_util.h"
 
 struct pipe_surface;
 struct st_framebuffer;