drivers: iio: cdc: Drop redundant if check

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexander Vorwerk <zabe@avorwerk.net>
Link: https://lore.kernel.org/r/20230105025351.12099-1-zabe@avorwerk.netSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/cdc/ad7746.c

@@ -285,8 +285,7 @@ static int ad7746_select_channel(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 
-		if (chip->capdac_set != chan->channel)
-			chip->capdac_set = chan->channel;
+		chip->capdac_set = chan->channel;
 		break;
 	case IIO_VOLTAGE:
 	case IIO_TEMP: