ASoC: samsung: Add missing pm ops for Snow sound card driver

Adding missing pm ops so that audio playback works across
suspend and resume cycle.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/samsung/snow.c

@@ -111,6 +111,7 @@ static struct platform_driver snow_driver = {
 	.driver = {
 		.name = "snow-audio",
 		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
 		.of_match_table = snow_of_match,
 	},
 	.probe = snow_probe,