msm: camera: Sensor changes for 8974

Populate child nodes during CCI probe. This is to ensure that
platform devices for camera is created after CCI is probed
successfully. Change camera sensor name in clock lookup table
to ensure that proper clocks are picked up.

Change-Id: I189372abac22bab08f9600d004c6af045881240b
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>