arm64: versal: Enable USB driver support

This patch adds usb host and device mode support for Xilinx
Versal virtual platform. By default USB host functionality
is enabled. To use in usb device mode, set dr_mode property
in DT to peripheral.

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