net/thunderx: fix multi segment Tx function return
net/thunderx: fix multi segment Tx function return

multi segment version of tx burst function was not
returning the actual number of packets sent out
in PMD xmit function.

Fixes: 1c421f18e0 ("net/thunderx: add single and multi-segment Tx")
Cc: stable@dpdk.org

Signed-off-by: Jerin Jacob <5bca7d2a432bc0f5422b70b2701a4e4fa32edd00@caviumnetworks.com>
Signed-off-by: Sunil Kulkarni <9cdc75f825f421df08a3989829c5f674f029bb84@caviumnetworks.com>

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