[ALSA] fix HD audio ALC882 lfe (un)mute

HDA Codec driver
Mark the ALC882 'LFE Playback Switch' as an input, like the other
playback switch settings.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_realtek.c

@@ -2501,7 +2501,7 @@ static snd_kcontrol_new_t alc882_base_mixer[] = {
 	HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x0e, 1, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x0e, 2, 0x0, HDA_OUTPUT),
 	ALC_BIND_MUTE_MONO("Center Playback Switch", 0x0e, 1, 2, HDA_INPUT),
-	ALC_BIND_MUTE_MONO("LFE Playback Switch", 0x0e, 2, 2, HDA_OUTPUT),
+	ALC_BIND_MUTE_MONO("LFE Playback Switch", 0x0e, 2, 2, HDA_INPUT),
 	HDA_CODEC_VOLUME("Side Playback Volume", 0x0f, 0x0, HDA_OUTPUT),
 	ALC_BIND_MUTE("Side Playback Switch", 0x0f, 2, HDA_INPUT),
 	HDA_CODEC_MUTE("Headphone Playback Switch", 0x1b, 0x0, HDA_OUTPUT),