Http boot on X64 platform is faild, this is caused by the incorrect type conversion when getting port number from Url. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Zhang Lubo <lubo.zhang@intel.com> Cc: Ye Ting <ting.ye@intel.com> Cc: Fu Siyuan <siyuan.fu@intel.com> Cc: Wu Jiaxin <jiaxin.wu@intel.com> Reviewed-by: Fu Siyuan <siyuan.fu@intel.com> Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>