arm64: zynqmp: Update device tree properties for nand flash

Update the following device tree properties for nand flash

- Set software ecc mode.
- Set bch as ecc algo.
- Set read block to 0.

Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>