optimize nf_inet_addr_cmp by 64bit xor computation
similar to ipv6_addr_equal()
Signed-off-by: NYuan Linsi <yuanlinsi01@baidu.com>
Signed-off-by: NLi RongQing <lirongqing@baidu.com>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>