[IPV6]: Fix build warning.

net/ipv6/ip6_fib.c: In function ‘fib6_add_rt2node’:
net/ipv6/ip6_fib.c:661: warning: label ‘out’ defined but not used
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ip6_fib.c

@@ -658,7 +658,6 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt,
 	 *	insert node
 	 */
 
-out:
 	rt->u.dst.rt6_next = iter;
 	*ins = rt;
 	rt->rt6i_node = fn;