Add support for this new phy ID.

Signed-off-by: Rick Hoover <RHoover@digilentinc.com>
Signed-off-by: Steven Wang <steven.wang@digilentinc.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>