ALSA: hda - Enable SPDIF for Acer TravelMate 6293

commit 24eff328f65c8ef352c90b6adb7c2f39eb94205d upstream.

BIOS on Acer TravelMate 6293 doesn't set up the SPDIF output pin
correctly as default, so enable it via a fixup entry.

Reported-and-tested-by: Hagen Heiduck <heiduck.suse@fmail.postpro.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>