i40e: add flow director for L2 payload
i40e: add flow director for L2 payload

This patch extends flow director to support l2_payload flow
type in i40e driver.

Test report: http://dpdk.org/ml/archives/dev/2015-June/020238.html

Signed-off-by: Jingjing Wu <64d28b617c3b4840f5ded1bfa611cba7fadfe5c7@intel.com>
Acked-by: Helin Zhang <aba9dfdb1a6ec8bf1ff66b95272c029f8dfde1b1@intel.com>

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