Add prompt & help string for PcdTpm2CurrentIrqNum, PcdTpm2PossibleIrqNumBuf Cc: Dandan Bi <dandan.bi@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Chao Zhang <chao.b.zhang@intel.com> Reviewed-by: Dandan Bi <dandan.bi@intel.com>