VFs all have subsystem ID 0. VIC models with the latest VF are at
least 40G, so report that as a more reasonable speed than 10G.
Fixes: 57bb45b37b ("net/enic: add PCI id for new virtual function")
Signed-off-by: Hyong Youb Kim <hyonkim@cisco.com>
Reviewed-by: John Daley <johndale@cisco.com>