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

Kill snd_assert() in sound/pci/*, 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/pci/ak4531_codec.c b/sound/pci/ak4531_codec.c
index 33d37b1..0f819dd 100644
--- a/sound/pci/ak4531_codec.c
+++ b/sound/pci/ak4531_codec.c
@@ -392,9 +392,10 @@
 		.dev_free =	snd_ak4531_dev_free,
 	};
 
-	snd_assert(rak4531 != NULL, return -EINVAL);
-	*rak4531 = NULL;
-	snd_assert(card != NULL && _ak4531 != NULL, return -EINVAL);
+	if (snd_BUG_ON(!card || !_ak4531))
+		return -EINVAL;
+	if (rak4531)
+		*rak4531 = NULL;
 	ak4531 = kzalloc(sizeof(*ak4531), GFP_KERNEL);
 	if (ak4531 == NULL)
 		return -ENOMEM;
@@ -428,7 +429,8 @@
 #if 0
 	snd_ak4531_dump(ak4531);
 #endif
-	*rak4531 = ak4531;
+	if (rak4531)
+		*rak4531 = ak4531;
 	return 0;
 }