[IPV4]: Cleanup the devinet_sysctl_register

I moved the call to kmalloc() from the *t declaration into
the code (this is confusing when a variable is initialized
with the result of some call) and removed unneeded comment
near the error path. Just like I did with the neigh ctl-s.

Besides, I fixed the goto's and the labels - they were indented
with spaces :(
Signed-off-by: NPavel Emelyanov <xemul@openvz.org>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/devinet.c

@@ -1506,12 +1506,13 @@ static void devinet_sysctl_register(struct in_device *in_dev,
 {
 	int i;
 	struct net_device *dev = in_dev ? in_dev->dev : NULL;
-	struct devinet_sysctl_table *t = kmemdup(&devinet_sysctl, sizeof(*t),
-						 GFP_KERNEL);
+	struct devinet_sysctl_table *t;
 	char *dev_name = NULL;
 
+	t = kmemdup(&devinet_sysctl, sizeof(*t), GFP_KERNEL);
 	if (!t)
-		return;
+		goto out;
+
 	for (i = 0; i < ARRAY_SIZE(t->devinet_vars) - 1; i++) {
 		t->devinet_vars[i].data += (char *)p - (char *)&ipv4_devconf;
 		t->devinet_vars[i].extra1 = p;
@@ -1547,11 +1548,11 @@ static void devinet_sysctl_register(struct in_device *in_dev,
 	p->sysctl = t;
 	return;
 
-	/* error path */
- free_procname:
+free_procname:
 	kfree(dev_name);
- free:
+free:
 	kfree(t);
+out:
 	return;
 }