app/testpmd: new flow director commands

app/testpmd: new flow director commands

The different fdir mode needs different parameters, so, the parameter *mode*
is introduced to the CLI flow_director_filter and flow_director_mask. This
parameter can pormpt the user to input the appropriate parameters for different
mode.
Please be aware, as we should set the fdir mode, the value of the parameter
pkt-filter-mode, when we start testpmd. We cannot set a different mode for
mask or filter.

The new CLIs are added for the mac vlan and tunnel modes, like this,
flow_director_mask X mode MAC-VLAN vlan XXXX mac XX,
flow_director_mask X mode Tunnel vlan XXXX mac XX tunnel-type X tunnel-id XXXX,
flow_director_filter X mode MAC-VLAN add/del/update mac XX:XX:XX:XX:XX:XX
vlan XXXX flexbytes (X,X) fwd/drop queue X fd_id X,
flow_director_filter X mode Tunnel add/del/update mac XX:XX:XX:XX:XX:XX
vlan XXXX tunnel NVGRE/VxLAN tunnel-id XXXX flexbytes (X,X) fwd/drop queue X
fd_id X.

Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>