net/igb: restore n-tuple filter
net/igb: restore n-tuple filter

Add support for restoring n-tuple filter in SW.

Signed-off-by: Wei Zhao <55941fd0e75edbdf274af2cfac8f147525678f08@intel.com>

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