iio: adc: rzg2l_adc: Use device_for_each_child_node_scoped()

Switching to the _scoped() version removes the need for manual
calling of fwnode_handle_put() in the paths where the code
exits the loop early. In this case that's all in error paths.

Cc: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20240224123215.161469-5-jic23@kernel.orgSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/rzg2l_adc.c

@@ -302,7 +302,6 @@ static irqreturn_t rzg2l_adc_isr(int irq, void *dev_id)
 static int rzg2l_adc_parse_properties(struct platform_device *pdev, struct rzg2l_adc *adc)
 {
 	struct iio_chan_spec *chan_array;
-	struct fwnode_handle *fwnode;
 	struct rzg2l_adc_data *data;
 	unsigned int channel;
 	int num_channels;
@@ -330,17 +329,13 @@ static int rzg2l_adc_parse_properties(struct platform_device *pdev, struct rzg2l
 		return -ENOMEM;
 
 	i = 0;
-	device_for_each_child_node(&pdev->dev, fwnode) {
+	device_for_each_child_node_scoped(&pdev->dev, fwnode) {
 		ret = fwnode_property_read_u32(fwnode, "reg", &channel);
-		if (ret) {
-			fwnode_handle_put(fwnode);
+		if (ret)
 			return ret;
-		}
 
-		if (channel >= RZG2L_ADC_MAX_CHANNELS) {
-			fwnode_handle_put(fwnode);
+		if (channel >= RZG2L_ADC_MAX_CHANNELS)
 			return -EINVAL;
-		}
 
 		chan_array[i].type = IIO_VOLTAGE;
 		chan_array[i].indexed = 1;