fix error:
05-16 06:42:05.688 347 596 V NatController: runCmd(/system/bin/ip6tables -w -t raw -A natctrl_raw_PREROUTING -i wlan0 -m rpfilter --invert ! -s fe80::/64 -j DROP) res=1
05-16 06:42:05.726 347 596 E NatController: Error setting forward rules
05-16 06:42:05.791 602 622 E TetherInterfaceSM: Exception enabling Nat: java.lang.IllegalStateException: command '53 nat enable wlan0 eth0 1 192.168.43.0/24' failed with '400 53 Nat op
eration failed (No such device)'
05-16 06:42:05.794 347 841 D TetherController: Sending update msg to dnsmasq [update_ifaces|wlan0]
05-16 06:42:05.796 347 596 D TetherController: untetherInterface(wlan0)
Change-Id: Iae2ec50bef0915aecc1b2befb014a87731e61643
Signed-off-by: zzc <zzc@rock-chips.com>
CONFIG_IP_NF_IPTABLES=y
CONFIG_IP_NF_MATCH_AH=y
CONFIG_IP_NF_MATCH_ECN=y
+CONFIG_IP_NF_MATCH_RPFILTER=y
CONFIG_IP_NF_MATCH_TTL=y
CONFIG_IP_NF_FILTER=y
CONFIG_IP_NF_TARGET_REJECT=y
CONFIG_IP_NF_ARP_MANGLE=y
CONFIG_NF_CONNTRACK_IPV6=y
CONFIG_IP6_NF_IPTABLES=y
+CONFIG_IP6_NF_MATCH_RPFILTER=y
CONFIG_IP6_NF_FILTER=y
CONFIG_IP6_NF_TARGET_REJECT=y
CONFIG_IP6_NF_MANGLE=y
CONFIG_IP6_NF_RAW=y
+CONFIG_IP6_NF_NAT=y
+CONFIG_IP6_NF_TARGET_MASQUERADE=y
CONFIG_BRIDGE_NF_EBTABLES=y
CONFIG_BRIDGE_EBT_BROUTE=y
CONFIG_L2TP=y