msm7x30: fix ION_CAMERA_HEAP usage

Change-Id: I79c88754cb1d4e39d58e88adb4b3391afb73d918
gpu: ion: Add backwards compatibility ioctls

 * Backwards-compatibiity ioctls for pre-MR1 userspace
 * Original patch by Oliver Gjoneski (detule) for D2

Change-Id: Ica119c27df564a5975ecabc9c00859a9fa8b2d7c