qdev: Un-deprecate qdev_init_nofail()

It's a perfectly sensible helper function.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

include/hw/qdev-core.h

@@ -65,8 +65,8 @@ struct VMStateDescription;
  * Operations depending on @props static properties should go into @realize.
  * After successful realization, setting static properties will fail.
  *
- * As an interim step, the #DeviceState:realized property is set by deprecated
- * function qdev_init_nofail().
+ * As an interim step, the #DeviceState:realized property can also be
+ * set with qdev_init_nofail().
  * In the future, devices will propagate this state change to their children
  * and along busses they expose.
  * The point in time will be deferred to machine creation, so that values