ALSA: oxygen: initialize spdif_playback_enable to 0

There's no reason for us to do that while we initialize dac_mute to
1. Also oxygen_init() has been clearing the OXYGEN_SPDIF_OUT_ENABLE
bit anyway.
Signed-off-by: Tom Yan <tom.ty89@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/oxygen/oxygen_lib.c

@@ -373,7 +373,7 @@ static void oxygen_init(struct oxygen *chip)
 	for (i = 0; i < 8; ++i)
 		chip->dac_volume[i] = chip->model.dac_volume_min;
 	chip->dac_mute = 1;
-	chip->spdif_playback_enable = 1;
+	chip->spdif_playback_enable = 0;
 	chip->spdif_bits = OXYGEN_SPDIF_C | OXYGEN_SPDIF_ORIGINAL |
 		(IEC958_AES1_CON_PCM_CODER << OXYGEN_SPDIF_CATEGORY_SHIFT);
 	chip->spdif_pcm_bits = chip->spdif_bits;