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: I24f77bba7382b77464b0456d505d5bcbe8e2d2a1
Signed-off-by: Govindaraj Rajagopal <grajagop@codeaurora.org>