Update the comments of ResetSystem() that was missed by 37078045d717 and 28426918f0ea. Cc: Ruiyu Ni <ruiyu.ni@intel.com> Cc: Dandan Bi <dandan.bi@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Star Zeng <star.zeng@intel.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com>