ALSA: Kill snd_assert() in sound/isa/*

Kill snd_assert() in sound/isa/*, 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/isa/sb/emu8000.c b/sound/isa/sb/emu8000.c
index b35be7d..96678d5 100644
--- a/sound/isa/sb/emu8000.c
+++ b/sound/isa/sb/emu8000.c
@@ -1023,7 +1023,8 @@
 {
 	int i, err = 0;
 
-	snd_assert(emu != NULL && card != NULL, return -EINVAL);
+	if (snd_BUG_ON(!emu || !card))
+		return -EINVAL;
 
 	spin_lock_init(&emu->control_lock);