netfilter: nf_tables: allow chain type to override hook register

Will be used in followup patch when nat types no longer
use nf_register_net_hook() but will instead register with the nat core.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 files changed