msm: vidc: General code clean up

Fixed a few spots where there were namespace leaks (i.e. hfi_* stuff
appearing where they have no business appearing).  Also collapsed a few
lines of code that could easily fit into 80 chars to reduce SLOC.

Change-Id: I468e470a84445c16f12be142afe5433ca05e3e41
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>