fix(plat/xilinx/versal): resolve misra R14.4

MISRA Violation: MISRA-C:2012 R.14.4
- The controlling expression of an if statement and the controlling
  expression of an iteration-statement shall have essentially Boolean type.

Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
Change-Id: I8cf821a42015858200cc0c514600012c8f61061f
3 files changed