[ALSA] hda-codec - Fix missing array terminators in AD1988 codec support

Fixed the missing array terminators in AD1988 codec support code.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/pci/hda/patch_analog.c

@@ -1639,6 +1639,7 @@ static struct snd_kcontrol_new ad1988_6stack_mixers1[] = {
 	HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x05, 1, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x05, 2, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME("Side Playback Volume", 0x0a, 0x0, HDA_OUTPUT),
+	{ } /* end */
 };
 
 static struct snd_kcontrol_new ad1988_6stack_mixers1_rev2[] = {
@@ -1647,6 +1648,7 @@ static struct snd_kcontrol_new ad1988_6stack_mixers1_rev2[] = {
 	HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x0a, 1, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x0a, 2, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME("Side Playback Volume", 0x06, 0x0, HDA_OUTPUT),
+	{ } /* end */
 };
 
 static struct snd_kcontrol_new ad1988_6stack_mixers2[] = {
@@ -1685,6 +1687,7 @@ static struct snd_kcontrol_new ad1988_3stack_mixers1[] = {
 	HDA_CODEC_VOLUME("Surround Playback Volume", 0x0a, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x05, 1, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x05, 2, 0x0, HDA_OUTPUT),
+	{ } /* end */
 };
 
 static struct snd_kcontrol_new ad1988_3stack_mixers1_rev2[] = {
@@ -1692,6 +1695,7 @@ static struct snd_kcontrol_new ad1988_3stack_mixers1_rev2[] = {
 	HDA_CODEC_VOLUME("Surround Playback Volume", 0x0a, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("Center Playback Volume", 0x06, 1, 0x0, HDA_OUTPUT),
 	HDA_CODEC_VOLUME_MONO("LFE Playback Volume", 0x06, 2, 0x0, HDA_OUTPUT),
+	{ } /* end */
 };
 
 static struct snd_kcontrol_new ad1988_3stack_mixers2[] = {