ASoC: wm1250-ev1: Support stereo

Springbank can support stereo, though it is primarily intended for mono
use cases.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/wm1250-ev1.c b/sound/soc/codecs/wm1250-ev1.c
index e7a599a..0766b5f 100644
--- a/sound/soc/codecs/wm1250-ev1.c
+++ b/sound/soc/codecs/wm1250-ev1.c
@@ -84,14 +84,14 @@
 	.playback = {
 		.stream_name = "Playback",
 		.channels_min = 1,
-		.channels_max = 1,
+		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 1,
-		.channels_max = 1,
+		.channels_max = 2,
 		.rates = SNDRV_PCM_RATE_8000,
 		.formats = SNDRV_PCM_FMTBIT_S16_LE,
 	},