Fix compilation errors with xt_portscan

SVN-Revision: 6578

target/linux/brcm63xx-2.6/config/default

@@ -188,7 +188,7 @@ CONFIG_IPW2200_DEBUG=y
 # CONFIG_IP_DCCP_DEBUG is not set
 CONFIG_IP_MROUTE=y
 # CONFIG_IP_NF_ARPTABLES is not set
-# CONFIG_IP_NF_CONNTRACK_MARK is not set
+CONFIG_IP_NF_CONNTRACK_MARK=y
 # CONFIG_IP_NF_CT_PROTO_SCTP is not set
 # CONFIG_IP_NF_MATCH_ADDRTYPE is not set
 # CONFIG_IP_NF_MATCH_HASHLIMIT is not set