ALSA: emu10k1: use the right lock in snd_emu10k1_shared_spdif_put()

The function does read-modify-write cycles on the card's registers, and
doesn't access mutable members of the emu data structure.

I suppose this might have been a mixup due to the lock names being
logically swapped.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230428095941.1706278-4-oswald.buddenhagen@gmx.deSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/emu10k1/emumixer.c

@@ -1654,7 +1654,7 @@ static int snd_emu10k1_shared_spdif_put(struct snd_kcontrol *kcontrol,
 	sw = ucontrol->value.integer.value[0];
 	if (emu->card_capabilities->invert_shared_spdif)
 		sw = !sw;
-	spin_lock_irqsave(&emu->reg_lock, flags);
+	spin_lock_irqsave(&emu->emu_lock, flags);
 	if ( emu->card_capabilities->i2c_adc) {
 		/* Do nothing for Audigy 2 ZS Notebook */
 	} else if (emu->audigy) {
@@ -1675,7 +1675,7 @@ static int snd_emu10k1_shared_spdif_put(struct snd_kcontrol *kcontrol,
 		reg |= val;
 		outl(reg | val, emu->port + HCFG);
 	}
-	spin_unlock_irqrestore(&emu->reg_lock, flags);
+	spin_unlock_irqrestore(&emu->emu_lock, flags);
 	return change;
 }