ASoC: tlv320dac33: Avoid multiple soft power up

During playback start the codec has been already powered at
BIAS_ON event time, so there's no need to enable the codec again.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/codecs/tlv320dac33.c b/sound/soc/codecs/tlv320dac33.c
index 080ec91..a0ba5d1 100644
--- a/sound/soc/codecs/tlv320dac33.c
+++ b/sound/soc/codecs/tlv320dac33.c
@@ -642,7 +642,8 @@
 
 	switch (level) {
 	case SND_SOC_BIAS_ON:
-		dac33_soft_power(codec, 1);
+		if (!dac33->substream)
+			dac33_soft_power(codec, 1);
 		break;
 	case SND_SOC_BIAS_PREPARE:
 		break;