According to cs4270 datasheet, there is no reference to mono mode.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
        .name = "cs4270-hifi",
        .playback = {
                .stream_name = "Playback",
-               .channels_min = 1,
+               .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_CONTINUOUS,
                .rate_min = 4000,
        },
        .capture = {
                .stream_name = "Capture",
-               .channels_min = 1,
+               .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_CONTINUOUS,
                .rate_min = 4000,