ipoe driver support for kernel 4.0

--- a/drivers/ipoe/ipoe.c.orig  2015-04-16 14:16:53.096400202 +0300
+++ a/drivers/ipoe/ipoe.c       2015-04-16 14:16:20.000000000 +0300
@@ -931,7 +931,7 @@
        if (!dev->ml_priv)
                goto out;

-       if (!vlan_tx_tag_present(skb))
+       if (!skb_vlan_tag_present(skb))
                goto out;

        rcu_read_lock();
@@ -1561,7 +1561,8 @@
            nla_put_u32(skb, IPOE_ATTR_ADDR, ses->addr))
                goto nla_put_failure;

-       return genlmsg_end(skb, hdr);
+       genlmsg_end(skb, hdr);
+       return 0;

 nla_put_failure:
        genlmsg_cancel(skb, hdr);