ALSA: Kill snd_assert() in other places

Kill snd_assert() in other places, either removed or replaced with
if () with snd_BUG_ON().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

sound/drivers/vx/vx_mixer.c

@@ -34,7 +34,8 @@ static void vx_write_codec_reg(struct vx_core *chip, int codec, unsigned int dat
 {
 	unsigned long flags;
 
-	snd_assert(chip->ops->write_codec, return);
+	if (snd_BUG_ON(!chip->ops->write_codec))
+		return;
 
 	if (chip->chip_status & VX_STAT_IS_STALE)
 		return;