rtnl/ipv4: use netconf msg to advertise rp_filter status

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/netconf.h b/include/uapi/linux/netconf.h
index d051372..75dcbc5 100644
--- a/include/uapi/linux/netconf.h
+++ b/include/uapi/linux/netconf.h
@@ -12,6 +12,7 @@
 	NETCONFA_UNSPEC,
 	NETCONFA_IFINDEX,
 	NETCONFA_FORWARDING,
+	NETCONFA_RP_FILTER,
 	__NETCONFA_MAX
 };
 #define NETCONFA_MAX	(__NETCONFA_MAX - 1)