fix(plat/xilinx/versal): resolve misra R15.6 in pm services

MISRA Violation: MISRA-C:2012 R.15.6
- The body of an iteration-statement or a selection-statement shall be
  a compound statement

Signed-off-by: Abhyuday Godhasara <abhyuday.godhasara@xilinx.com>
Change-Id: I82e924a77ee3afeb56fa18714e94cc4f6fff5a49
3 files changed