msm: vidc: Video driver update to kernel 3.4.

During the migration from kernel 3.0 to 3.4, V4L2 framework changed.
This requires changes from video driver. This change makes video
driver code compatible with kernel 3.4.

Change-Id: I12fb28e4b7c261c9755fbb62bb6bb8ea299d5272
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>