ixgbe: Fix device capabilities of 82599 single speed fiber NICs.

82599 single speed fiber modules only support 10G/Full. Return
proper device capabilities while querrying the adapter and error
while changing device advertisement/speed/duplex capabilities.

Signed-off-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>