msm: camera: cci: Add support for burst read

Configure the read threshold level and implement change
to enable burst read. This change also bumps up the max
bytes that can be read in a single transaction.

Change-Id: I6ab4d5db302ddf49387bf47916e264714ca434e6
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>