staging: iio: cdc: remove braces from single line if blocks

Remove braces from single line if blocks to clear checkpatch warnings.
WARNING: braces {} are not necessary for single statement blocks
Signed-off-by: Alexander Vorwerk <alec@vc-celle.de>
Link: https://lore.kernel.org/r/20210820224914.1260-1-alec@vc-celle.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/staging/iio/cdc/ad7746.c

@@ -241,10 +241,8 @@ static int ad7746_select_channel(struct iio_dev *indio_dev,
 		if (ret < 0)
 			return ret;
 
-		if (chip->capdac_set != chan->channel) {
-
+		if (chip->capdac_set != chan->channel)
 			chip->capdac_set = chan->channel;
-		}
 		break;
 	case IIO_VOLTAGE:
 	case IIO_TEMP: