netfilter: x_tables: use NFPROTO_* in extensions

net/bridge/netfilter/ebt_log.c

net/bridge/netfilter/ebt_ulog.c

net/ipv4/netfilter/arp_tables.c

net/ipv4/netfilter/arpt_mangle.c

net/ipv4/netfilter/arptable_filter.c

net/ipv4/netfilter/ipt_CLUSTERIP.c

net/ipv4/netfilter/ipt_ECN.c

net/ipv4/netfilter/ipt_LOG.c

net/ipv4/netfilter/ipt_MASQUERADE.c

net/ipv4/netfilter/ipt_NETMAP.c

net/ipv4/netfilter/ipt_REDIRECT.c

net/ipv4/netfilter/ipt_REJECT.c

net/ipv4/netfilter/ipt_TTL.c

net/ipv4/netfilter/ipt_ULOG.c

net/ipv4/netfilter/ipt_addrtype.c

net/ipv4/netfilter/ipt_ah.c

net/ipv4/netfilter/ipt_ecn.c

net/ipv4/netfilter/ipt_ttl.c

net/ipv6/netfilter/ip6t_HL.c

net/ipv6/netfilter/ip6t_LOG.c