Tx offload mask is updated in following commit 
1037ed842c37
("mbuf: fix Tx offload mask"). Currently, the new added offload
flags are not supported in PMD and application will fail to call
PMD transmit prepare function.
This patch updates AVF_TX_OFFFLOAD_MASK.
Fixes: 1037ed842c37 ("mbuf: fix Tx offload mask")
Cc: stable@dpdk.org
Signed-off-by: Zhirun Yan <zhirun.yan@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
                PKT_TX_TCP_SEG)
 
 #define AVF_TX_OFFLOAD_MASK (  \
+               PKT_TX_OUTER_IPV6 |              \
+               PKT_TX_OUTER_IPV4 |              \
+               PKT_TX_IPV6 |                    \
+               PKT_TX_IPV4 |                    \
                PKT_TX_VLAN_PKT |                \
                PKT_TX_IP_CKSUM |                \
                PKT_TX_L4_MASK |                 \