msm: camera: isp: Stop burst stream on epoch of last frame

Program the burst stream's period and pattern to stop when the
last frame is reached. Presently it is being stopped 1 frame
after the last frame which causes extra power to be used. This
change stops the stream on last frame.

CRs-Fixed: 1036029
Change-Id: I74e9bc8317068089dd6643131e3be11ef3851909
Signed-off-by: Shubhraprakash Das <sadas@codeaurora.org>