msm: camera: add i2c API with slave address

Currently sensor always uses the slave address specified in the device
tree. This API enables read/write to arbitrary slave address through i2c or
CCI.

Change-Id: I5d070ac97abf598ab4ed1d902374aeb1a0074aee
Signed-off-by: Punit Soni <punits@codeaurora.org>