backlight: 88pm860x_bl: Add missing of_node_put

Author: Julia Lawall <Julia.Lawall@lip6.fr>

for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

The semantic patch that fixes this problem is as follows
(http://coccinelle.lip6.fr):

// 
@@
expression root,e;
local idexpression child;
iterator name for_each_child_of_node;
@@

 for_each_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
+  of_node_put(child);
?  break;
   ...
}
... when != child
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Lee Jones 

---
 drivers/video/backlight/88pm860x_bl.c | 1 +
 1 file changed, 1 insertion(+)
 
diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c
index 2da5862..6d8dc2c 100644
--- a/drivers/video/backlight/88pm860x_bl.c
+++ b/drivers/video/backlight/88pm860x_bl.c
@@ -180,6 +180,7 @@ static int pm860x_backlight_dt_init(struct platform_device *pdev,
 			data->iset = PM8606_WLED_CURRENT(iset);
 			of_property_read_u32(np, "marvell,88pm860x-pwm",
 					     &data->pwm);
+			of_node_put(np);
 			break;
 		}
 	}