CorebootModulePkg: Use PCD for memory type information initialization
    
    CorebootModulePkg currently uses a hardcoded table for memory type
    initialization. It might need to be adjusted by platform to reduce
    the memory fragmentation. So changing to use PCDs rather than
    constant values to facilitate the customization.
    
    Cc: Prince Agyeman <prince.agyeman@intel.com>
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Maurice Ma <maurice.ma@intel.com>
    Reviewed-by: Prince Agyeman <prince.agyeman@intel.com>