ASoC: samsung: Allow mono in i2s driver

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index b302f3b..a7e3519 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1060,7 +1060,7 @@
 	i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
 	i2s->i2s_dai_drv.suspend = i2s_suspend;
 	i2s->i2s_dai_drv.resume = i2s_resume;
-	i2s->i2s_dai_drv.playback.channels_min = 2;
+	i2s->i2s_dai_drv.playback.channels_min = 1;
 	i2s->i2s_dai_drv.playback.channels_max = 2;
 	i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
 	i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;