Apply segmentation offload when requested for non tunneled
packets e.g. IPsec transport mode.
Fixes: 1e728b01120c ("net/iavf: rework Tx path")
Cc: stable@dpdk.org
Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
Reviewed-by: Qi Zhang <qi.z.zhang@intel.com>