leds: aat1290: Add missing of_node_put

The refcount of device_node increases after of_get_next_available_child()
is called. Make sure it is decremented also in case of DT parsing error.

Signed-off-by: Jacek Anaszewski <[e-mail]>
Cc: Rob Herring <[e-mail]>
Cc: Sakari Ailus <[e-mail]>

drivers/leds/leds-aat1290.c

···
 	if (ret < 0) {
 		dev_err(dev,
 			"flash-max-microamp DT property missing\n");
-		return ret;
+		goto err_parse_dt;
 	}
 
 	ret = of_property_read_u32(child_node, "flash-max-timeout-us",
···
 	if (ret < 0) {
 		dev_err(dev,
 			"flash-max-timeout-us DT property missing\n");
-		return ret;
+		goto err_parse_dt;
 	}
 
-	of_node_put(child_node);
-
 	*sub_node = child_node;
+
+err_parse_dt:
+	of_node_put(child_node);
 
 	return ret;
 }