msm: msm8916: camera: Add ov7695 sensor driver and device tree changes

This is camera driver ov7695 0.3MP which is needed
to enable front camera on 8916 3 mode Tianyu devices.
Change-Id: I476c57001aaf5185e6ad1d1929a1d2737c64c73b
Signed-off-by: Kerong Sui <ksui@codeaurora.org>