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>
diff --git a/sound/drivers/opl3/opl3_synth.c b/sound/drivers/opl3/opl3_synth.c
index fb64c89..962bb9c 100644
--- a/sound/drivers/opl3/opl3_synth.c
+++ b/sound/drivers/opl3/opl3_synth.c
@@ -92,7 +92,8 @@
 	struct snd_opl3 *opl3 = hw->private_data;
 	void __user *argp = (void __user *)arg;
 
-	snd_assert(opl3 != NULL, return -EINVAL);
+	if (snd_BUG_ON(!opl3))
+		return -EINVAL;
 
 	switch (cmd) {
 		/* get information */