msm: camera: sensor: Support slave address for every reg setting

This change handles I2C slave address command to support
multi-slave usecases.

Change-Id: I4936f0684b9d030fa0f2493760664c42d92d5331
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>