ASoC: Free memory in the error paths of soc_of_parse_audio_routing()

Release the memory of the routing table before leaving the function upon errors
in the device tree

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/soc-core.c

@@ -4136,6 +4136,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 			dev_err(card->dev,
 				"Property '%s' index %d could not be read: %d\n",
 				propname, 2 * i, ret);
+			kfree(routes);
 			return -EINVAL;
 		}
 		ret = of_property_read_string_index(np, propname,
@@ -4144,6 +4145,7 @@ int snd_soc_of_parse_audio_routing(struct snd_soc_card *card,
 			dev_err(card->dev,
 				"Property '%s' index %d could not be read: %d\n",
 				propname, (2 * i) + 1, ret);
+			kfree(routes);
 			return -EINVAL;
 		}
 	}