iio: adc: ad4851: ad4851_set_oversampling_ratio parameters update

Remove chan parameter from ad4851_set_oversampling_ratio parameters
list because the parameter is not used.

Reviewed-by: David Lechner <[e-mail]>
Signed-off-by: Pop Ioan Daniel <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jonathan Cameron <[e-mail]>

drivers/iio/adc/ad4851.c

···
 }
 
 static int ad4851_set_oversampling_ratio(struct iio_dev *indio_dev,
-					 const struct iio_chan_spec *chan,
 					 unsigned int osr)
 {
 	struct ad4851_state *st = iio_priv(indio_dev);
···
 	case IIO_CHAN_INFO_CALIBBIAS:
 		return ad4851_set_calibbias(st, chan->channel, val);
 	case IIO_CHAN_INFO_OVERSAMPLING_RATIO:
-		return ad4851_set_oversampling_ratio(indio_dev, chan, val);
+		return ad4851_set_oversampling_ratio(indio_dev, val);
 	default:
 		return -EINVAL;
 	}