Need remove erroneous semicolon, which is found by EXTRA_CFLAGS=-W,
the related commit number: 
c54419321455631079c7d6e60bc732dd0c5914c5
("GRE: Refactor GRE tunneling code")
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
        if (dev->header_ops) {
                /* Need space for new headers */
                if (skb_cow_head(skb, dev->needed_headroom -
-                                     (tunnel->hlen + sizeof(struct iphdr))));
+                                     (tunnel->hlen + sizeof(struct iphdr))))
                        goto free_skb;
 
                tnl_params = (const struct iphdr *)skb->data;