ALSA: azt2320: Fix assignment in if condition

ISA AZT2320 driver code contains lots of 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/20210608140540.17885-14-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/azt2320.c

@@ -148,9 +148,11 @@ static int snd_card_azt2320_enable_wss(unsigned long port)
 {
 	int error;
 
-	if ((error = snd_card_azt2320_command(port, 0x09)))
+	error = snd_card_azt2320_command(port, 0x09);
+	if (error)
 		return error;
-	if ((error = snd_card_azt2320_command(port, 0x00)))
+	error = snd_card_azt2320_command(port, 0x00);
+	if (error)
 		return error;
 
 	mdelay(5);
@@ -174,12 +176,14 @@ static int snd_card_azt2320_probe(int dev,
 		return error;
 	acard = card->private_data;
 
-	if ((error = snd_card_azt2320_pnp(dev, acard, pcard, pid))) {
+	error = snd_card_azt2320_pnp(dev, acard, pcard, pid);
+	if (error) {
 		snd_card_free(card);
 		return error;
 	}
 
-	if ((error = snd_card_azt2320_enable_wss(port[dev]))) {
+	error = snd_card_azt2320_enable_wss(port[dev]);
+	if (error) {
 		snd_card_free(card);
 		return error;
 	}
@@ -228,18 +232,21 @@ static int snd_card_azt2320_probe(int dev,
 			snd_printk(KERN_ERR PFX "no OPL device at 0x%lx-0x%lx\n",
 				   fm_port[dev], fm_port[dev] + 2);
 		} else {
-			if ((error = snd_opl3_timer_new(opl3, 1, 2)) < 0) {
+			error = snd_opl3_timer_new(opl3, 1, 2);
+			if (error < 0) {
 				snd_card_free(card);
 				return error;
 			}
-			if ((error = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
+			error = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
+			if (error < 0) {
 				snd_card_free(card);
 				return error;
 			}
 		}
 	}
 
-	if ((error = snd_card_register(card)) < 0) {
+	error = snd_card_register(card);
+	if (error < 0) {
 		snd_card_free(card);
 		return error;
 	}