RDMA/nes: Add support for 4-port 1G HP blade card

Add support for NetEffect 4 port 1G HP blade card.  The mapping
between physical port and MAC is different from the standup card.

Signed-off-by: Chien Tung <ctung@neteffect.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>