ALSA: sparc: Fix assignment in if condition

SPARC drivers contain a few assignments in if condition, which is a
bad coding style that may confuse readers and occasionally lead to
bugs.

This patch is merely for coding-style fixes, no functional changes.

Link: https://lore.kernel.org/r/20210608140540.17885-59-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/sparc/amd7930.c b/sound/sparc/amd7930.c
index d24ae00..c434b69 100644
--- a/sound/sparc/amd7930.c
+++ b/sound/sparc/amd7930.c
@@ -975,8 +975,9 @@ static int snd_amd7930_create(struct snd_card *card,
 
 	spin_unlock_irqrestore(&amd->lock, flags);
 
-	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
-				  amd, &snd_amd7930_dev_ops)) < 0) {
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
+			     amd, &snd_amd7930_dev_ops);
+	if (err < 0) {
 		snd_amd7930_free(amd);
 		return err;
 	}
@@ -1019,13 +1020,16 @@ static int amd7930_sbus_probe(struct platform_device *op)
 				      irq, dev_num, &amd)) < 0)
 		goto out_err;
 
-	if ((err = snd_amd7930_pcm(amd)) < 0)
+	err = snd_amd7930_pcm(amd);
+	if (err < 0)
 		goto out_err;
 
-	if ((err = snd_amd7930_mixer(amd)) < 0)
+	err = snd_amd7930_mixer(amd);
+	if (err < 0)
 		goto out_err;
 
-	if ((err = snd_card_register(card)) < 0)
+	err = snd_card_register(card);
+	if (err < 0)
 		goto out_err;
 
 	amd->next = amd7930_list;