linux/orion: fix iproute2 issue (partially closes ticket #7862)

SVN-Revision: 22878

target/linux/orion/config-default

@@ -105,7 +105,6 @@ CONFIG_INITRAMFS_SOURCE=""
 # CONFIG_IP6_NF_MATCH_OPTS is not set
 # CONFIG_IP6_NF_MATCH_RT is not set
 # CONFIG_IP6_NF_TARGET_LOG is not set
-# CONFIG_IP_ADVANCED_ROUTER is not set
 CONFIG_IP_MROUTE=y
 # CONFIG_IP_NF_ARPTABLES is not set
 # CONFIG_IP_NF_MATCH_ADDRTYPE is not set