iio: accel: cros_ec_accel_legacy: make use of iio_get_masklength()

Ue iio_get_masklength() to access '.masklength' so it can be annotated
as __private when there are no more direct users of it.
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Alexandru Ardelean <aardelean@baylibre.com>
Link: https://patch.msgid.link/20240702-dev-iio-masklength-private-v1-8-98193bf536a6@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/cros_ec_accel_legacy.c

@@ -62,7 +62,7 @@ static int cros_ec_accel_legacy_read_cmd(struct iio_dev *indio_dev,
 		return ret;
 	}
 
-	for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+	for_each_set_bit(i, &scan_mask, iio_get_masklength(indio_dev)) {
 		*data = st->resp->dump.sensor[sensor_num].data[i] *
 			st->sign[i];
 		data++;