i40e: advertise TSO capability
i40e: advertise TSO capability

Advertise the DEV_TX_OFFLOAD_TCP_TSO flag in the PMD features. It means
that the i40e PMD supports the offload of TSO.

Test report: http://www.dpdk.org/ml/archives/dev/2015-March/014467.html

Signed-off-by: Jijiang Liu <10b95deab7df654d0c21c8c98b54c9a1ecf2a5c0@intel.com>
Signed-off-by: Miroslaw Walukiewicz <46e039fd8271f6a84eb34845288d2fbea31654c1@intel.com>
Acked-by: Konstantin Ananyev <cbd5212b59ab42a210d72992d23a3aa17cfd3eaf@intel.com>
Acked-by: Helin Zhang <aba9dfdb1a6ec8bf1ff66b95272c029f8dfde1b1@intel.com>
Tested-by: Min Cao <2a88aab028744885054f990971530d20553769a9@intel.com>

mixja/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,msune/dpdk,msune/dpdk,tsphillips/dpdk-fork,msune/dpdk,mixja/dpdk,venkynv/dpdk-mirror,mixja/dpdk,tsphillips/dpdk-fork,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,john-mcnamara-intel/dpdk,tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,john-mcnamara-intel/dpdk,venkynv/dpdk-mirror,mixja/dpdk