msm: Initial ais driver for automotive camera

Initial driver directory setup for automotive
imaging subsystem - ais. The camera kernel drivers
for mobile and automotive platforms have been decoupled
and placed in separate directories as automotive usecases
will require significant divergence from mobile drivers.
The changes to the imaging pipeline drivers enable
automotive imaging subsystem interface from userspace.

Change-Id: I49b8e827818994d0a8b320ffe92f8031ffbb69ca
Signed-off-by: Terence Ho <terenceh@codeaurora.org>