hwmon: (gsc-hwmon) Add missing of_node_put()

In gsc_hwmon_get_devtree_pdata(), of_find_compatible_node() will return
a node pointer with refcount incremented. We should use of_node_put() in
fail path or when it is not used anymore.
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220616114024.3985770-1-windhl@126.comSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/gsc-hwmon.c

@@ -269,10 +269,13 @@ gsc_hwmon_get_devtree_pdata(struct device *dev)
 	/* fan controller base address */
 	fan = of_find_compatible_node(dev->parent->of_node, NULL, "gw,gsc-fan");
 	if (fan && of_property_read_u32(fan, "reg", &pdata->fan_base)) {
+		of_node_put(fan);
 		dev_err(dev, "fan node without base\n");
 		return ERR_PTR(-EINVAL);
 	}
 
+	of_node_put(fan);
+
 	/* allocate structures for channels and count instances of each type */
 	device_for_each_child_node(dev, child) {
 		if (fwnode_property_read_string(child, "label", &ch->name)) {