Only exploit ipf state keeping for CFW logging.

*** 66,75 ****
--- 66,76 ----
  icmptoicmp6types
  icmptoicmp6unreach
  idletime_tab
  ip6exthdr
  ipf_cb_ops
+ ipf_cfwlog_enabled
  ipf_dev_info
  ipf_devfiles
  ipf_eth_bcast_addr
  ipf_eth_ipv4_mcast
  ipf_eth_ipv6_mcast