hwmon: (ltc2991) use device_for_each_child_node_scoped()

Switch to the _scoped() version introduced in commit 365130fd
("device property: Introduce device_for_each_child_node_scoped()")
to remove the need for manual calling of fwnode_handle_put() in the
paths where the code exits the loop early.
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://lore.kernel.org/r/20240404-hwmon_device_for_each_child_node_scoped-v1-1-53997abde43c@gmail.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/ltc2991.c

@@ -284,7 +284,6 @@ static const struct regmap_config ltc2991_regmap_config = {
 
 static int ltc2991_init(struct ltc2991_state *st, struct device *dev)
 {
-	struct fwnode_handle *child;
 	int ret;
 	u32 val, addr;
 	u8 v5_v8_reg_data = 0, v1_v4_reg_data = 0;
@@ -294,17 +293,13 @@ static int ltc2991_init(struct ltc2991_state *st, struct device *dev)
 		return dev_err_probe(dev, ret,
 				     "failed to enable regulator\n");
 
-	device_for_each_child_node(dev, child) {
+	device_for_each_child_node_scoped(dev, child) {
 		ret = fwnode_property_read_u32(child, "reg", &addr);
-		if (ret < 0) {
-			fwnode_handle_put(child);
+		if (ret < 0)
 			return ret;
-		}
 
-		if (addr > 3) {
-			fwnode_handle_put(child);
+		if (addr > 3)
 			return -EINVAL;
-		}
 
 		ret = fwnode_property_read_u32(child,
 					       "shunt-resistor-micro-ohms",