tunnels: fix netns vs proto registration ordering

Same stuff as in ip_gre patch: receive hook can be called before netns
setup is done, oopsing in net_generic().

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
static void ip6_tnl_dev_setup(struct net_device *dev)
{
	dev->netdev_ops = &ip6_tnl_netdev_ops;
	dev->destructor = free_netdev;

	dev->type = ARPHRD_TUNNEL6;
	dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
	dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
	dev->flags |= IFF_NOARP;
	dev->addr_len = sizeof(struct in6_addr);
	dev->features |= NETIF_F_NETNS_LOCAL;
}

static void ip6_tnl_dev_setup(struct net_device *dev)
{
	dev->netdev_ops = &ip6_tnl_netdev_ops;
	dev->destructor = free_netdev;

	dev->type = ARPHRD_TUNNEL6;
	dev->hard_header_len = LL_MAX_HEADER + sizeof (struct ipv6hdr);
	dev->mtu = ETH_DATA_LEN - sizeof (struct ipv6hdr);
	dev->flags |= IFF_NOARP;
	dev->addr_len = sizeof(struct in6_addr);
	dev->features |= NETIF_F_NETNS_LOCAL;
}
