msm: camera: isp: Update Slave frame_id based on Master

In master-slave mode, set Slave frame id = master frame id,
if the delta between the timestamp is < Threshold. If delta is
higher than threshold, slave frame_id = master + 1.

Change-Id: I68f1c5354334bc11795739836a9a75436bde38be
Signed-off-by: Harsh Shah <harshs@codeaurora.org>