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
Merge pull request #6 from CyanogenMod/cm-11.0

camera_v1: Fix the post-processor