IntelSiliconPkg MicrocodeUpdateDxe: Honor FIT table
    
    It is the second step for
    https://bugzilla.tianocore.org/show_bug.cgi?id=540.
    
    V2: Use error handling instead of ASSERT for FIT table checking result.
    
    Cc: Jiewen Yao <jiewen.yao@intel.com>
    Contributed-under: TianoCore Contribution Agreement 1.1
    Signed-off-by: Star Zeng <star.zeng@intel.com>
    Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>