This patch enable i40e outer vlan strip on and off in QinQ
mode with mask bit of DEV_RX_OFFLOAD_QINQ_STRIP, users can
use "vlan set qinq_strip on 0" to enable or "vlan set
qinq_strip off 0" to disable i40e outer vlan strip when
try with testpmd app.
Fixes: 4861cde46116 ("i40e: new poll mode driver")
Cc: stable@dpdk.org
Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
Reviewed-by: Qiming Yang <qiming.yang@intel.com>
c52ff36686