compat: ipv6: Pass struct net into nf_ct_frag6_gather.

compat: ipv6: Pass struct net into nf_ct_frag6_gather.

Upstream commit:
    ipv6: Pass struct net into nf_ct_frag6_gather

    The function nf_ct_frag6_gather is called on both the input and the
    output paths of the networking stack.  In particular ipv6_defrag which
    calls nf_ct_frag6_gather is called from both the the PRE_ROUTING chain
    on input and the LOCAL_OUT chain on output.

    The addition of a net parameter makes it explicit which network
    namespace the packets are being reassembled in, and removes the need
    for nf_ct_frag6_gather to guess.

    Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
    Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
    Signed-off-by: David S. Miller <davem@davemloft.net>
Upstream: b72775977c39 ("ipv6: Pass struct net into nf_ct_frag6_gather")
Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Jesse Gross <jesse@kernel.org>