The AD codecs have hardware SPDIF volume/switch controls but they
are not assigned to the slave list for virtual master controls.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
        "Headphone Playback Volume",
        "Mono Playback Volume",
        "Speaker Playback Volume",
+       "IEC958 Playback Volume",
        NULL
 };
 
        "Headphone Playback Switch",
        "Mono Playback Switch",
        "Speaker Playback Switch",
+       "IEC958 Playback Switch",
        NULL
 };
 
        "Internal Mic Playback Volume",
        "Docking Mic Playback Volume"
        "Beep Playback Volume",
+       "IEC958 Playback Volume",
        NULL
 };