fix(xilinx): update define for ZynqMP specific functions

Instead of exclude code for Versal, define only for ZynqMP.
For new platforms this code should be excluded so instead of
excluding for all platform, define only for ZynqMP.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Change-Id: I45798dadc0f374c5794f517f7d0158675a75caa9
1 file changed