msm: camera: icp: Fix incrementing array index in prepare args

Increment the index values while prepare args. Without
increment we save all the fence handles into 0 index always
and this overrides previous handles in that index.

Change-Id: I39dfb77cab942042c03059ac2047c4856c5f4fb3
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>