Moves custom smmu API's to cam_compat as some of them are legacy and will not be supported in newer kernel versions. CRs-Fixed: 3048249 Change-Id: Ic9db5d9d295eb02e8bd2d593721b65e30d605f72 Signed-off-by: Karthik Jayakumar <kjayakum@codeaurora.org>