feat(xilinx): add SPP/EMU platform support for versal

This patch adds SPP/EMU platform support for Xilinx Versal and
also updating the documentation.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: Ibdadec4d00cd33ea32332299e7a00de31dc9d60b
2 files changed