net, ip6_tunnel: fix namespaces move
in the same manner as commit
29cda8c4a719 ("net, ip_tunnel: fix
namespaces move"), fix namespace moving as it was broken since commit
14c27b7fecb6 ("ip6_tunnel: add collect_md mode to IPv6 tunnel"), but for
ipv6 this time; there is no reason to keep it for ip6_tunnel.
Fixes: 14c27b7fecb6 ("ip6_tunnel: add collect_md mode to IPv6 tunnel")
Signed-off-by: William Dauchy <w.dauchy@criteo.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>