12cfc90 MdePkg/PiMmCis.h: Fix build failure.

Authored and Committed by Eric Dong 6 years ago
    MdePkg/PiMmCis.h: Fix build failure.
    
    Include the missed header file to fix build failure.
    
    Cc: Liming Gao <liming.gao@intel.com>
    Contributed-under: TianoCore Contribution Agreement 1.1
    Signed-off-by: Eric Dong <eric.dong@intel.com>
    Reviewed-by: Liming Gao <liming.gao@intel.com>
    
        
file modified
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