[ALSA] Fix addition of user-defined boolean controls

Fixed the addition of user-defined boolean controls, the private
data size is corrected to be handled properly.
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>

sound/core/control.c

@@ -1018,10 +1018,6 @@ static int snd_ctl_elem_add(struct snd_ctl_file *file,
 	}
 	switch (info->type) {
 	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
-		private_size = sizeof(char);
-		if (info->count > 128)
-			return -EINVAL;
-		break;
 	case SNDRV_CTL_ELEM_TYPE_INTEGER:
 		private_size = sizeof(long);
 		if (info->count > 128)