arm/dt: msm8226: Change mount angle for camera

Back and front cameras are mounted at different angles with respect
to reference plane on 8226 CDP, MTP and QRD. Change mount angle
property to offset it. Create new dtsi file for CDP since the mount
angle is different for CDP and QRD. Remove length field in reg
property since the register address corresponds to i2c slave address.

Change-Id: If69a2489a982de3b203effa5f7fb225ea9916727
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>