msm: camera: Add retry mechanism to detect camera sensor

When device power up, probe happens where camera sensors
connected in each slot are detected by reading its chip id. Add
retry mechanism to try 3 times to read chip id for detecting
camera sensors.

Change-Id: I1ba41795e53b993ab8e5b92c72016b089fa1a8cb
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>