iio: common: cros_ec_sensors_core: use new '.masklength' accessors

Make use of iio_get_masklength) and iio_for_each_active_channel() 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>
Link: https://patch.msgid.link/20240726-dev-iio-masklength-private3-v1-21-82913fc0fb87@analog.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c

@@ -198,9 +198,7 @@ int cros_ec_sensors_push_data(struct iio_dev *indio_dev,
 		return 0;
 
 	out = (s16 *)st->samples;
-	for_each_set_bit(i,
-			 indio_dev->active_scan_mask,
-			 indio_dev->masklength) {
+	iio_for_each_active_channel(indio_dev, i) {
 		*out = data[i];
 		out++;
 	}
@@ -587,7 +585,7 @@ static int cros_ec_sensors_read_data_unsafe(struct iio_dev *indio_dev,
 	int ret;
 
 	/* Read all sensors enabled in scan_mask. Each value is 2 bytes. */
-	for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+	for_each_set_bit(i, &scan_mask, iio_get_masklength(indio_dev)) {
 		ret = cros_ec_sensors_cmd_read_u16(ec,
 					     cros_ec_sensors_idx_to_reg(st, i),
 					     data);
@@ -683,7 +681,7 @@ int cros_ec_sensors_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->data.data[i];
 		data++;
 	}