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/wss/wss_lib.c b/sound/isa/wss/wss_lib.c
index 6b7a0fc..c5beec6 100644
--- a/sound/isa/wss/wss_lib.c
+++ b/sound/isa/wss/wss_lib.c
@@ -1946,7 +1946,8 @@
 	char **ptexts = texts;
 	struct snd_wss *chip = snd_kcontrol_chip(kcontrol);
 
-	snd_assert(chip->card != NULL, return -EINVAL);
+	if (snd_BUG_ON(!chip->card))
+		return -EINVAL;
 	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
 	uinfo->count = 2;
 	uinfo->value.enumerated.items = 4;
@@ -2262,7 +2263,8 @@
 	unsigned int idx;
 	int err;
 
-	snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);
+	if (snd_BUG_ON(!chip || !chip->pcm))
+		return -EINVAL;
 
 	card = chip->card;