net/enic: extend flow director support for 1300 series

net/enic: extend flow director support for 1300 series

1300 series Cisco adapter firmware version 2.0(13) for UCS
C-series servers and 3.1(2) for blade servers supports more
filtering capabilities. The feature can be enabled via Cisco
CIMC or USCM with the 'advanced filters' radio button. When
enabled, the these additional flow director modes are available:
	RTE_ETH_FLOW_NONFRAG_IPV4_OTHER
	RTE_ETH_FLOW_NONFRAG_IPV4_SCTP
	RTE_ETH_FLOW_NONFRAG_IPV6_UDP
	RTE_ETH_FLOW_NONFRAG_IPV6_TCP
	RTE_ETH_FLOW_NONFRAG_IPV6_SCTP
	RTE_ETH_FLOW_NONFRAG_IPV6_OTHER

Changes:
- Detect and set an 'advanced filters' flag dependent on the adapter
  capability.
- Implement RTE_ETH_FILTER_INFO filter op to return the flow types
  available dependent on whether advanced filters are enabled.
- Use a function pointer to select how filters are added to the adapter:
  copy_fltr_v1() for older firmware/adapters or copy_fltr_v2() for
  adapters which support advanced filters.
- Apply fdir global masks to filters when in advanced filter mode.
- Update documentation.

Signed-off-by: John Daley <johndale@cisco.com>
Reviewed-by: Nelson Escobar <neescoba@cisco.com>