msm: camera: Update all drivers to use camera IO api's

Update all camera drivers to use the msm camera
common IO api's instead of directly calling readl/writel
and move the IO util file to common folder.

Change-Id: I48989ad4758f01e54167f3a73036f94ac1f73276
Signed-off-by: Hariram Purushothaman <hariramp@codeaurora.org>