drm/host1x: stop casting VMA offsets to 32bit

VMA offsets are 64bit so do not cast them to "unsigned int". Also remove
the (now useless) offset-retrieval helper. The VMA manager provides simple
enough helpers.

Cc: Thierry Reding <[e-mail]>
Cc: "Terje Bergström" <[e-mail]>
Cc: Arto Merilainen <[e-mail]>
Signed-off-by: David Herrmann <[e-mail]>
Signed-off-by: Dave Airlie <[e-mail]>

drivers/gpu/host1x/drm/drm.c

···
 
 	bo = to_tegra_bo(gem);
 
-	args->offset = tegra_bo_get_mmap_offset(bo);
+	args->offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 
 	drm_gem_object_unreference(gem);
 

drivers/gpu/host1x/drm/gem.c

···
 	dma_free_writecombine(drm->dev, bo->gem.size, bo->vaddr, bo->paddr);
 }
 
-unsigned int tegra_bo_get_mmap_offset(struct tegra_bo *bo)
-{
-	return (unsigned int)drm_vma_node_offset_addr(&bo->gem.vma_node);
-}
-
 struct tegra_bo *tegra_bo_create(struct drm_device *drm, unsigned int size)
 {
 	struct tegra_bo *bo;
···
 
 	bo = to_tegra_bo(gem);
 
-	*offset = tegra_bo_get_mmap_offset(bo);
+	*offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
 
 	drm_gem_object_unreference(gem);
 

drivers/gpu/host1x/drm/gem.h

···
 					    unsigned int size,
 					    unsigned int *handle);
 void tegra_bo_free_object(struct drm_gem_object *gem);
-unsigned int tegra_bo_get_mmap_offset(struct tegra_bo *bo);
 int tegra_bo_dumb_create(struct drm_file *file, struct drm_device *drm,
 			 struct drm_mode_create_dumb *args);
 int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,