Vlv2TbltDevicePkg: Display logo on BOOT_ON_FLASH_UPDATE
    
    https://bugzilla.tianocore.org/show_bug.cgi?id=911
    
    Update PlatformBdsLib to show boot logo when the boot
    mode is BOOT_ON_FLASH_UPDATE.
    
    Cc: David Wei <david.wei@intel.com>
    Cc: Mang Guo <mang.guo@intel.com>
    Cc: Jiewen Yao <jiewen.yao@intel.com>
    Contributed-under: TianoCore Contribution Agreement 1.1
    Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
    Reviewed-by: David Wei <david.wei@intel.com>