media: vsp1: Clean up DLM objects on error

If there is an error allocating a display list within a DLM object
the existing display lists are not free'd, and neither is the DL body
pool.

Use the existing vsp1_dlm_destroy() function to clean up on error.
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/vsp1/vsp1_dl.c

@@ -858,8 +858,10 @@ struct vsp1_dl_manager *vsp1_dlm_create(struct vsp1_device *vsp1,
 		struct vsp1_dl_list *dl;
 
 		dl = vsp1_dl_list_alloc(dlm);
-		if (!dl)
+		if (!dl) {
+			vsp1_dlm_destroy(dlm);
 			return NULL;
+		}
 
 		list_add_tail(&dl->list, &dlm->free);
 	}