ASoC: mc13783: Remove mono support

Playing a mono track on a mc13783 codec results in incorrect playback rate.

Remove mono support so that a mono track can be played correctly.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Tested-by: Gaëtan Carlier <gcembed@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/mc13783.c

@@ -659,7 +659,7 @@ static struct snd_soc_dai_driver mc13783_dai_async[] = {
 		.id = MC13783_ID_STEREO_DAC,
 		.playback = {
 			.stream_name = "Playback",
-			.channels_min = 1,
+			.channels_min = 2,
 			.channels_max = 2,
 			.rates = SNDRV_PCM_RATE_8000_96000,
 			.formats = MC13783_FORMATS,
@@ -670,7 +670,7 @@ static struct snd_soc_dai_driver mc13783_dai_async[] = {
 		.id = MC13783_ID_STEREO_CODEC,
 		.capture = {
 			.stream_name = "Capture",
-			.channels_min = 1,
+			.channels_min = 2,
 			.channels_max = 2,
 			.rates = MC13783_RATES_RECORD,
 			.formats = MC13783_FORMATS,
@@ -692,14 +692,14 @@ static struct snd_soc_dai_driver mc13783_dai_sync[] = {
 		.id = MC13783_ID_SYNC,
 		.playback = {
 			.stream_name = "Playback",
-			.channels_min = 1,
+			.channels_min = 2,
 			.channels_max = 2,
 			.rates = SNDRV_PCM_RATE_8000_96000,
 			.formats = MC13783_FORMATS,
 		},
 		.capture = {
 			.stream_name = "Capture",
-			.channels_min = 1,
+			.channels_min = 2,
 			.channels_max = 2,
 			.rates = MC13783_RATES_RECORD,
 			.formats = MC13783_FORMATS,