msm: camera: Add camera support for apq8009

Initial snapshot of camera drivers are taken from msm-3.18 kernel
version @ 'commit cb28f8462e97 ("Merge PM / devfreq: memlat: Remove
kfree() on probe fails")'. Make required changes in camera
drivers to support camera modules on apq8009.

Change-Id: I3324684bcb866a9c67c1ba53d24fabd2bd98be43
Signed-off-by: Sundara Vinayagam <sundvi@codeaurora.org>