fix(zynqmp): resolve misra R15.7 warnings

MISRA Violation: MISRA-C:2012 R.15.7
- All if . . else if constructs shall be terminated
with an else statement.

Signed-off-by: Venkatesh Yadav Abbarapu <venkatesh.abbarapu@xilinx.com>
Change-Id: If921ca7c30b2feea6535791aa15f4de7101c3134