msm: camera: prepare msm8x60 camera for V4L2 architecture.

- This change is intended towards unifying camera architecture
  across all msm chipsets.
- This new architecture is V4L2 based and is already supported
  on msm7x27a, msm8960 and apq8064.
- This change prepares msm8x60 camera for this new architecture
  without enabling it at this moment.

Change-Id: I8e1a7f4893fdf873243597be9c29ac829d315cf8
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>
Signed-off-by: Ankit Premrajka <ankitp@codeaurora.org>
Signed-off-by: Ujwal Patel <ujwalp@codeaurora.org>
Signed-off-by: Aditya Degwekar <adityad@codeaurora.org>
Signed-off-by: Sunil Joseph <sunilj@codeaurora.org>