ASoC: nau8825: Declare 2 channels for DAI of capture stream

The patch is to make driver with flexibility for more platforms support even if
the internal design is just one ADC. Besides, many I2S controllers only support
2 channels.
Signed-off-by: David Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20220708054647.540621-1-CTLIN0@nuvoton.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/nau8825.c

@@ -1440,7 +1440,7 @@ static struct snd_soc_dai_driver nau8825_dai = {
 	.capture = {
 		.stream_name	 = "Capture",
 		.channels_min	 = 1,
-		.channels_max	 = 1,
+		.channels_max	 = 2,   /* Only 1 channel of data */
 		.rates		 = NAU8825_RATES,
 		.formats	 = NAU8825_FORMATS,
 	},