ARM64: zynqmp: Modify the autoboot commands

Modify DFU commands to use latest kernel offsets and sizes
as per modified partitions in the linux device tree.

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