drm/tegra: Use .dumb_map_offset and .dumb_destroy defaults

This driver can use the drm_driver.dumb_destroy and
drm_driver.dumb_map_offset defaults, so no need to set them.

Cc: Thierry Reding <[e-mail]>
Signed-off-by: Noralf Trønnes <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/tegra/drm.c

···
 	.gem_prime_import = tegra_gem_prime_import,
 
 	.dumb_create = tegra_bo_dumb_create,
-	.dumb_map_offset = tegra_bo_dumb_map_offset,
-	.dumb_destroy = drm_gem_dumb_destroy,
 
 	.ioctls = tegra_drm_ioctls,
 	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),

drivers/gpu/drm/tegra/gem.c

···
 	return 0;
 }
 
-int tegra_bo_dumb_map_offset(struct drm_file *file, struct drm_device *drm,
-			     u32 handle, u64 *offset)
-{
-	struct drm_gem_object *gem;
-	struct tegra_bo *bo;
-
-	gem = drm_gem_object_lookup(file, handle);
-	if (!gem) {
-		dev_err(drm->dev, "failed to lookup GEM object\n");
-		return -EINVAL;
-	}
-
-	bo = to_tegra_bo(gem);
-
-	*offset = drm_vma_node_offset_addr(&bo->gem.vma_node);
-
-	drm_gem_object_unreference_unlocked(gem);
-
-	return 0;
-}
-
 static int tegra_bo_fault(struct vm_fault *vmf)
 {
 	struct vm_area_struct *vma = vmf->vma;

drivers/gpu/drm/tegra/gem.h

···
 void tegra_bo_free_object(struct drm_gem_object *gem);
 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,
-			     u32 handle, u64 *offset);
 
 int tegra_drm_mmap(struct file *file, struct vm_area_struct *vma);