drm/komeda: Add missing of_node_get() call

komeda_pipeline_destroy has the matching of_node_put().

Fixes: 29e56aec911dd ("drm/komeda: Add DT parsing")
Signed-off-by: Mihail Atanassov <[e-mail]>
Reviewed-by: Ayan Kumar Halder <[e-mail]>
[Rebased on the latest drm-misc-fixes]
Signed-off-by: Ayan Kumar Halder <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/325278/

Change-Id: I5fa2479d6cb3a77182f1a92833c1c0bca8668cb4

drivers/gpu/drm/arm/display/komeda/komeda_dev.c

···
 	pipe->of_output_port =
 		of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
 
-	pipe->of_node = np;
+	pipe->of_node = of_node_get(np);
 
 	return 0;
 }