compat: Add a struct net parameter to l4_pkt_to_tuple.

compat: Add a struct net parameter to l4_pkt_to_tuple.

Upstream commit:
    netfilter: nf_conntrack: Add a struct net parameter to l4_pkt_to_tuple

    As gre does not have the srckey in the packet gre_pkt_to_tuple
    needs to perform a lookup in it's per network namespace tables.

    Pass in the proper network namespace to all pkt_to_tuple
    implementations to ensure gre (and any similar protocols) can get this
    right.

    Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
    Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Upstream: a31f1adc0948 ("netfilter: nf_conntrack: Add a struct net
parameter to l4_pkt_to_tuple")
Signed-off-by: Joe Stringer <joe@ovn.org>
Acked-by: Jesse Gross <jesse@kernel.org>