Add Nicira extension vlan_tci field
Add Nicira extension vlan_tci field

This Nicira extension field is VLAN VID+CFI+PCP.
OXM_OF_VLAN_VID and OXM_OF_VLAN_PCP should work fine in theory, but
in OvS it seems vlan_tci must be used to access the CFI bit from
NX_LEARN actions.

Signed-off-by: IWAMOTO Toshihiro <8e41ae29694291a01b8efca6b4a0005a87ddb93e@valinux.co.jp>
Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

osrg/ryu,osrg/ryu,pichuang/ryu,TakeshiTseng/ryu,fkakuma/ryu,pichuang/ryu,TakeshiTseng/ryu,gareging/SDN_Framework,lagopus/ryu-lagopus-ext,iwaseyusuke/ryu,shinpeimuraoka/ryu,lagopus/ryu-lagopus-ext,pichuang/ryu,shinpeimuraoka/ryu,osrg/ryu,lagopus/ryu-lagopus-ext,fujita/ryu,gareging/SDN_Framework,fkakuma/ryu,fkakuma/ryu,TakeshiTseng/ryu,gareging/SDN_Framework,shinpeimuraoka/ryu,TakeshiTseng/ryu,gareging/SDN_Framework,pichuang/ryu,iwaseyusuke/ryu,lagopus/ryu-lagopus-ext,fujita/ryu,shinpeimuraoka/ryu,pichuang/ryu,fujita/ryu,fkakuma/ryu,fujita/ryu,lagopus/ryu-lagopus-ext,shinpeimuraoka/ryu,fkakuma/ryu,osrg/ryu,iwaseyusuke/ryu,fujita/ryu,gareging/SDN_Framework,TakeshiTseng/ryu,iwaseyusuke/ryu,osrg/ryu,iwaseyusuke/ryu