arm64: zynqmp: Enable Micrel phy support for xilinx zc1275 revB

This patch enables Micrel phy support for Xilinx ZynqMP zc1275
revB board.

Signed-off-by: Siva Durga Prasad Paladugu <siva.durga.paladugu@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>