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>