igb: migrate syn filter to new API
igb: migrate syn filter to new API

This patch defines new functions dealing with syn filter.
It removes old functions of syn filter in igb driver.
Syn filter is dealt with through entrance eth_igb_filter_ctrl.

Signed-off-by: Jingjing Wu <64d28b617c3b4840f5ded1bfa611cba7fadfe5c7@intel.com>

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