ASoC: audio-graph-card2: Add of_node_put() in fail path

In asoc_simple_parse_dai(), we should call of_node_put() for the
reference returned by of_graph_get_port_parent() in fail path.

Fixes: 6e5f68fe3f2d ("ASoC: add Audio Graph Card2 driver")
Signed-off-by: Liang He <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/generic/audio-graph-card2.c

···
 	 *    if he unbinded CPU or Codec.
 	 */
 	ret = snd_soc_get_dai_name(&args, &dlc->dai_name);
-	if (ret < 0)
+	if (ret < 0) {
+		of_node_put(node);
 		return ret;
+	}
 
 	dlc->of_node = node;