ixgbevf VLAN strip and extend capabilities were removed when
migrating to the bit flags implementation.
Restoring the capability to enable the VLAN strip offload at
configuration time.
Fixes: ec3b1124d1 ("net/ixgbe: convert to new Rx offloads API")
Cc: stable@dpdk.org
Signed-off-by: David Harton <dharton@cisco.com>
Acked-by: Wei Zhao <wei.zhao1@intel.com>