[ALSA] fix HD audio ALC260 mono (un)mute

HDA Codec driver
The ALC260 'Mono Playback Switch' is marked as an output in
patch_realtek.c. It actually does not work unless it is marked as an
input. Go figure... This was tested and confirmed on an HP xw4300.
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -2243,7 +2243,7 @@ static snd_kcontrol_new_t alc260_base_mixer[] = {
 	HDA_CODEC_VOLUME("Headphone Playback Volume", 0x09, 0x0, HDA_OUTPUT),
 	ALC_BIND_MUTE("Headphone Playback Switch", 0x09, 2, HDA_INPUT),
 	HDA_CODEC_VOLUME_MONO("Mono Playback Volume", 0x0a, 1, 0x0, HDA_OUTPUT),
-	ALC_BIND_MUTE_MONO("Mono Playback Switch", 0x0a, 1, 2, HDA_OUTPUT),
+	ALC_BIND_MUTE_MONO("Mono Playback Switch", 0x0a, 1, 2, HDA_INPUT),
 	HDA_CODEC_VOLUME("Capture Volume", 0x04, 0x0, HDA_INPUT),
 	HDA_CODEC_MUTE("Capture Switch", 0x04, 0x0, HDA_INPUT),
 	{
@@ -2270,7 +2270,7 @@ static snd_kcontrol_new_t alc260_hp_mixer[] = {
 	HDA_CODEC_VOLUME("Headphone Playback Volume", 0x09, 0x0, HDA_OUTPUT),
 	ALC_BIND_MUTE("Headphone Playback Switch", 0x09, 2, HDA_INPUT),
 	HDA_CODEC_VOLUME_MONO("Mono Playback Volume", 0x0a, 1, 0x0, HDA_OUTPUT),
-	ALC_BIND_MUTE_MONO("Mono Playback Switch", 0x0a, 1, 2, HDA_OUTPUT),
+	ALC_BIND_MUTE_MONO("Mono Playback Switch", 0x0a, 1, 2, HDA_INPUT),
 	HDA_CODEC_VOLUME("Capture Volume", 0x05, 0x0, HDA_INPUT),
 	HDA_CODEC_MUTE("Capture Switch", 0x05, 0x0, HDA_INPUT),
 	{