msm: vidc: Load hfi packetization based on Venus version

There is difference in hfi packetization between
Venus 2.x and Venus 3.x, which breaks backward compatibiity
in the video driver. To overcome this problem, load the
hfi packetization functions based on the Venus hardware
version.

Change-Id: Iece60d9765c8020ed5df55071595431bc6779453
Signed-off-by: Arun Menon <avmenon@codeaurora.org>