fix(plat/xilinx/versal): resolve misra R10.1 in pm services

MISRA Violation: MISRA-C:2012 R.10.1
- Operands shall not be of an inappropriate essential type.

Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
Change-Id: I67b5788054a136be8d764472c5d85528a5c4272f
3 files changed