msm: camera: icp: Signal all fences when request is done.

Firmware notifies ICP KMD when all frames in payload are done,
so there is no need to keep track of buf dones individually.
Change made to signal all fences when firmware is done.

Change-Id: I140c378a6eabbf806f6da58a5c1a9ef061d83251
Signed-off-by: Sagar Gore <sgore@codeaurora.org>
Signed-off-by: Lakshmi Narayana Kalavala <lkalaval@codeaurora.org>