drivers/net/fs_enet/fs_enet-main.c: Add of_node_put to avoid memory leak

In this case, a device_node structure is stored in another structure that
is then freed without first decrementing the reference count of the
device_node structure.

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

// <smpl>
@r exists@
expression x;
identifier f;
position p1,p2;
@@

x@p1->f = \(of_find_node_by_path\|of_find_node_by_name\|of_find_node_by_phandle\|of_get_parent\|of_get_next_parent\|of_get_next_child\|of_find_compatible_node\|of_match_node\|of_find_node_by_type\|of_find_node_with_property\|of_find_matching_node\|of_parse_phandle\|of_node_get\)(...);
... when != of_node_put(x)
kfree@p2(x)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@
cocci.print_main("call",p1)
cocci.print_secs("free",p2)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/fs_enet/fs_enet-main.c

@@ -1036,7 +1036,7 @@ static int __devinit fs_enet_probe(struct platform_device *ofdev,
 	ndev = alloc_etherdev(privsize);
 	if (!ndev) {
 		ret = -ENOMEM;
-		goto out_free_fpi;
+		goto out_put;
 	}
 
 	SET_NETDEV_DEV(ndev, &ofdev->dev);
@@ -1099,6 +1099,7 @@ out_cleanup_data:
 out_free_dev:
 	free_netdev(ndev);
 	dev_set_drvdata(&ofdev->dev, NULL);
+out_put:
 	of_node_put(fpi->phy_node);
 out_free_fpi:
 	kfree(fpi);