arm64: versal: Define configs related to USB DFU functionality

This patch defines macros required for DFU functionality
for Xilinx Versal platform.

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