qxl: Remove qxl_bo_init() return value

It's always returning 0, and it's always ignored.
Signed-off-by: NChristophe Fergeau <cfergeau@redhat.com>
Acked-by: NFrediano Ziglio <fziglio@redhat.com>
Message-id: 20161108091209.25568-6-cfergeau@redhat.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

drivers/gpu/drm/qxl/qxl_drv.h

@@ -399,7 +399,7 @@ int qxl_create_monitors_object(struct qxl_device *qdev);
 int qxl_destroy_monitors_object(struct qxl_device *qdev);
 
 /* qxl_gem.c */
-int qxl_gem_init(struct qxl_device *qdev);
+void qxl_gem_init(struct qxl_device *qdev);
 void qxl_gem_fini(struct qxl_device *qdev);
 int qxl_gem_object_create(struct qxl_device *qdev, int size,
 			  int alignment, int initial_domain,

drivers/gpu/drm/qxl/qxl_gem.c

@@ -111,10 +111,9 @@ void qxl_gem_object_close(struct drm_gem_object *obj,
 {
 }
 
-int qxl_gem_init(struct qxl_device *qdev)
+void qxl_gem_init(struct qxl_device *qdev)
 {
 	INIT_LIST_HEAD(&qdev->gem.objects);
-	return 0;
 }
 
 void qxl_gem_fini(struct qxl_device *qdev)