uboot-phytec

gpio: zynq: Remove non driver model code

Remove non driver model support as it moved
to driver model. Dont need non driver model
anymore.

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