[FIX] Rename Xilinx ARM board configuration file.

This fix shall be stashed with commit
[TASK] Add cmake configuration files for target Xilinx ARM

Signed-off-by: Gaurav Kumar Singh <gaurav@kalycito.com>
[FIX] Integrate review comments

This provides fix for commit:
[TASK] Add support for target Xilinx ARM in stack.

Signed-off-by: Gaurav Kumar Singh <gaurav@kalycito.com>