drm/tegra: gem: Use iommu_map_sg()
The iommu_map_sg() function is now available in the IOMMU API, so drop
the open-coded variant.
Signed-off-by: NThierry Reding <treding@nvidia.com>
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The iommu_map_sg() function is now available in the IOMMU API, so drop
the open-coded variant.
Signed-off-by: NThierry Reding <treding@nvidia.com>