This fixes the input layer beep not working on some EeePC 1000 models by
adding the subsystem id into whitelist. Otherwise the corresponding ALSA
mixer is not enabled and stays muted, resulting in no console beep.
Signed-off-by: Madis Janson <madis@cyber.ee>
Signed-off-by: Takashi Iwai <tiwai@suse.de>