iio: adc: ad4130: Use device_for_each_child_node_scoped() to simplify error paths.

This loop definition removes the need for manual releasing of the fwnode_handle
in early exit paths (here an error path) allow simplfication of the code
and reducing the chance of future modificiations not releasing
fwnode_handle correctly.

Cc: Cosmin Tanislav <demonsingur@gmail.com>
Cc: Nuno Sa <nuno.sa@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240330190849.1321065-5-jic23@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad4130.c

@@ -1600,17 +1600,14 @@ static int ad4130_parse_fw_children(struct iio_dev *indio_dev)
 {
 	struct ad4130_state *st = iio_priv(indio_dev);
 	struct device *dev = &st->spi->dev;
-	struct fwnode_handle *child;
 	int ret;
 
 	indio_dev->channels = st->chans;
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		ret = ad4130_parse_fw_channel(indio_dev, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 	}
 
 	return 0;