fix(versal): fix Misra-C violations in bl31_setup and pm_svc_main

Fix some Misra-C violations. The similar fixes were done by commit
eb0d2b17722c ("fix(zynqmp): resolve misra R15.6 warnings") and commit
dd1fe7178b57 ("fix(zynqmp): resolve misra R14.4 warnings").

Signed-off-by: Michal Simek <michal.simek@amd.com>
Change-Id: I3ffa92724a09871f7f99c9ac6c326994c165e9bd
2 files changed