msm: camera: Change camera server into a video node

Convert ioctl and server node to be compliant with
v4l2 architecture.
Add multiple control and event queue to
support multiple camera instance

Change-Id: Idcb8533e15599f7fb0ad621c3da6b19235fa64f4
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>
10 files changed