drm/prime: Unconditionally set up the prime file private

It's tiny, already embedded, and setup/teardown cost is trivial.
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190614203615.12639-5-daniel.vetter@ffwll.ch

drivers/gpu/drm/drm_file.c

@@ -147,7 +147,6 @@ struct drm_file *drm_file_alloc(struct drm_minor *minor)
 	if (drm_core_check_feature(dev, DRIVER_SYNCOBJ))
 		drm_syncobj_open(file);
 
-	if (drm_core_check_feature(dev, DRIVER_PRIME))
 	drm_prime_init_file_private(&file->prime);
 
 	if (dev->driver->open) {
@@ -159,7 +158,6 @@ struct drm_file *drm_file_alloc(struct drm_minor *minor)
 	return file;
 
 out_prime_destroy:
-	if (drm_core_check_feature(dev, DRIVER_PRIME))
 	drm_prime_destroy_file_private(&file->prime);
 	if (drm_core_check_feature(dev, DRIVER_SYNCOBJ))
 		drm_syncobj_release(file);
@@ -253,7 +251,6 @@ void drm_file_free(struct drm_file *file)
 	if (dev->driver->postclose)
 		dev->driver->postclose(dev, file);
 
-	if (drm_core_check_feature(dev, DRIVER_PRIME))
 	drm_prime_destroy_file_private(&file->prime);
 
 	WARN_ON(!list_empty(&file->event_list));

drivers/gpu/drm/drm_gem.c

@@ -254,7 +254,6 @@ drm_gem_object_release_handle(int id, void *ptr, void *data)
 	else if (dev->driver->gem_close_object)
 		dev->driver->gem_close_object(obj, file_priv);
 
-	if (drm_core_check_feature(dev, DRIVER_PRIME))
 	drm_gem_remove_prime_handles(obj, file_priv);
 	drm_vma_node_revoke(&obj->vma_node, file_priv);