msm: vidc: Fix compiler warnings

Fix a handful of compiler warnings; mostly printk format errors but a
few unused variables as well.

Fixes: 5d2a39bc ("msm: vidc: Set properties in start streaming")
Fixes: e8507af2 ("msm: vidc: Add snapshot of MSM video driver")
Change-Id: Ic0dedbad8d3a7f85fc9e117547cd239a987c3693
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>