msm: camera: Add initial commit for camera drivers on 3.18

Add initial commit for all camera related drivers on 3.18
kernel branch.

Driver is equivalent to AU_LINUX_ANDROID_LA.HB.1.1.1.05.00.02.063.080
(3bc54cf8).

Signed-off-by: Azam Sadiq Pasha Kapatrala Syed <akapatra@codeaurora.org>
Signed-off-by: Seemanta Dutta <seemanta@codeaurora.org>