msm: camera: Add crop support in ISPIF

Ispif crops sensor input for dual VFE to use.
Sensor will still output only one big frame, and
ispif needs to split a whole frame into two part
for dual ISP to use.

Change-Id: I42ae48bc3b070625e91f3cc5003339ba8035d6b9
Signed-off-by: Peter Liu <pingchie@codeaurora.org>
Signed-off-by: Mingcheng Zhu <mingchen@codeaurora.org>