msm: camera: Populate sensor eeprom subdev id during probe

We can use this change in camera multimodule architecture.

Add support for more than one eeprom source per generic
camera node. All sensors using that node search for
specific eeprom sub device and update id.

Change-Id: I1e8cb8be81e4e9e272f8521ad95a30dcd30e5af7
Signed-off-by: Evgeniy Borisov <eborisov@codeaurora.org>