For orderedlist question, the value is stored in a buffer, not in HiiValue. So when need to get default value from callback function for orderedlist, need to pass the buffer. This patch is to enhance this logic. Cc: Liming Gao <liming.gao@intel.com> Cc: Eric Dong <eric.dong@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Dandan Bi <dandan.bi@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Liming Gao <liming.gao@intel.com>