power: max8925: Use of_get_child_by_name

Use of_get_child_by_name to obtain reference to charger node instead of
of_find_node_by_name which can walk outside of the parent node.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/max8925_power.c

@@ -443,7 +443,7 @@ max8925_power_dt_init(struct platform_device *pdev)
 	if (!nproot)
 		return pdev->dev.platform_data;
 
-	np = of_find_node_by_name(nproot, "charger");
+	np = of_get_child_by_name(nproot, "charger");
 	if (!np) {
 		dev_err(&pdev->dev, "failed to find charger node\n");
 		return NULL;