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If there is no card presented before power on, there would have no card change interrupt generated. This is a corner case which can't be handled by old logic. The patch is used to move card present detection in the front of card change interrupt detection. Cc: Hao Wu <hao.a.wu@intel.com> Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Feng Tian <feng.tian@intel.com> Reviewed-by: Hao Wu <hao.a.wu@intel.com>