REF: https://bugzilla.tianocore.org/show_bug.cgi?id=370 Use GLOBAL_REMOVE_IF_UNREFERENCED for some SMRAM profile global variables, then their symbols could be removed when SMRAM profile is disabled. Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Feng Tian <feng.tian@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>