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/dummy.c b/sound/drivers/dummy.c
index 4e4c69e..c873243 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -565,7 +565,8 @@
 	unsigned int idx;
 	int err;
 
-	snd_assert(dummy != NULL, return -EINVAL);
+	if (snd_BUG_ON(!dummy))
+		return -EINVAL;
 	spin_lock_init(&dummy->mixer_lock);
 	strcpy(card->mixername, "Dummy Mixer");