Revert "widget: fix the abi break."

This reverts commit 841fcdfb18a414a7381910bcbb0b0ef4807bc5c2.

It's been too much passed.
we have more dependencies to the change (ie, key bindings)
so conclude to have the abi break in this case.

legacy/elementary/src/lib/elm_widget.c

@@ -3684,7 +3684,7 @@ elm_widget_type_get(const Evas_Object *obj)
 {
    API_ENTRY return NULL;
 
-   return evas_object_type_get(obj);
+   return eo_class_name_get(eo_class_get(obj));
 }
 
 EAPI Eina_Bool