After implementing the fdir new modes for x550, the CLIs are modified.
Forgot to update the related help info and doc.
Fixes: 53b2bb9b7ea7 ("app/testpmd: new flow director commands")
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>