MdeModulePkg/UefiBootManagerLib: Generate boot description for SD/eMMC
    
    REF:https://bugzilla.tianocore.org/show_bug.cgi?id=620
    
    Adds the support for SD/eMMC device path to show as a boot option.
    
    The CID register content (returned from DiskInfo->Inquiry) seems do not
    provide very useful/readable 'OEM/Application ID' and 'Product name'
    field.
    
    For SD devices, the OID is a 2-character ASCII string and the Product name
    is a 5-character ASCII string.
    
    For eMMC devices, the OID is an 8-bit binary number and the Product name
    is a 6-character ASCII string.
    
    These strings are relatively short and do not provide a very readable
    description. Hence, this commit uses general 'SD (eMMC) Device' for the
    boot option description.
    
    Contributed-under: TianoCore Contribution Agreement 1.1
    Signed-off-by: Hao Wu <hao.a.wu@intel.com>
    Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>