EnableQuietBoot and DisableQuietBoot are copied from IntelFrameworkModulePkg/Library/GenericBdsLib/BdsConsole.c. Because these two functions are not in UefiBootManagerLib. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>