netfilter: nf_conntrack: fix warning and prototype mismatch

net/netfilter/nf_conntrack_core.c:46:1: warning: symbol 'nfnetlink_parse_nat_setup_hook' was not declared. Should it be static?

Including the proper header also revealed an incorrect prototype.

Signed-off-by: Patrick McHardy <kaber@trash.net>
1 file changed