backlight: 88pm860x_bl: Add missing of_node_put

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):

// <smpl>
@@
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
// </smpl>

Signed-off-by: Julia Lawall <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/video/backlight/88pm860x_bl.c

···
 			data->iset = PM8606_WLED_CURRENT(iset);
 			of_property_read_u32(np, "marvell,88pm860x-pwm",
 					     &data->pwm);
+			of_node_put(np);
 			break;
 		}
 	}