The current GenCfgOpt tool does not generate bit fields in BSF. This change will allow bit fields to be created in BSF for a specific FSP UPD item. The argument for the tool is also updated to be in sync with the old usage model in IntelFspPkg. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com> Reviewed-by: Giri P Mudusuru <giri.p.mudusuru@intel.com>