plat: xilinx: versal: Move versal_def.h to include directory

Move versal_def.h to platform specific include directory.
Also, update source file to include header file from updated
path of versal_def.h

Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: I313592a17552843b9cc7048f31bcaaefa40ffd91
3 files changed