msm: vidc: fix KCFI errors

Fix errors reported after enabling Kernel Control Flow
Integrity (KCFI) on kernel code. This is a security
mechanism that disallows changes to the original
control flow of a compiled binary.

Change-Id: I1e1e901c5889d9928411dc785da88e1eac378560
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>