net/avf: fix Tx offload mask
net/avf: fix Tx offload mask

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 <b538ef8f17930f0f0ad649b62c00dfecb344b61d@intel.com>
Reviewed-by: Ferruh Yigit <ba8734c3c506d2e3557bd4ac8fdaccd25bdb9aa7@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk