Ui layout: fix another text retrieval line of code

This is a follow-up to a44ae48df811ff2bd085da86db1688c0f387efc4.Need to
undo the markup_get call, so that the correct code path
(_efl_ui_layout_text_set) is used. Legacy checks are in that code path.

ref T6642

src/lib/elementary/efl_ui_layout.c

@@ -2499,7 +2499,7 @@ elm_layout_text_get(const Eo *obj, const char *part)
    else if (!_elm_layout_part_aliasing_eval(obj, &part, EINA_TRUE))
      return NULL;
 
-   return efl_text_markup_get(efl_part(obj, part));
+   return efl_text_get(efl_part(obj, part));
 }
 
 EAPI Eina_Bool