Remove unused function gk20a_get_phys_from_iova. At the same time remove the #include for iommu.h, which was only needed by this function. Change-Id: Ia858b0ad5fe7e423d650aa9f82e430f419f2a492 Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com> Reviewed-on: http://git-master/r/1319070 Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>