camera_v1: Fix the post-processor

This implementation was mismatched with userspace, resulting in the
inability to handle frames. Fixit by restoring an older version

Change-Id: I92f053ec03f4e4cce5cf18b0177b81352fd262a0

Conflicts:
	drivers/media/video/msm/msm_vpe.c
	include/media/msm_isp.h