leds: flash: mt6370: Switch to device_for_each_child_node_scoped()

Switch to device_for_each_child_node_scoped() to simplify the code by
removing the need for calls to fwnode_handle_put() in the error paths.

This also prevents possible memory leaks if new error paths are added
without the required call to fwnode_handle_put().

Signed-off-by: Javier Carrasco <[e-mail]>
Link: https://lore.kernel.org/r/2[e-mail]
Signed-off-by: Lee Jones <[e-mail]>

drivers/leds/flash/leds-mt6370-flash.c

···
 {
 	struct device *dev = &pdev->dev;
 	struct mt6370_priv *priv;
-	struct fwnode_handle *child;
 	size_t count;
 	int i = 0, ret;
 
···
 	if (!priv->regmap)
 		return dev_err_probe(dev, -ENODEV, "Failed to get parent regmap\n");
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		struct mt6370_led *led = priv->leds + i;
 
 		led->priv = priv;
 
 		ret = mt6370_init_flash_properties(dev, led, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		ret = mt6370_led_register(dev, led, child);
-		if (ret) {
-			fwnode_handle_put(child);
+		if (ret)
 			return ret;
-		}
 
 		i++;
 	}