ALSA: opti-miro: Fix missing semicolon

To fix a build error
  sound/isa/opti9xx/miro.c:1281: error: expected ';' before '}' token

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/isa/opti9xx/miro.c

diff --git a/sound/isa/opti9xx/miro.c b/sound/isa/opti9xx/miro.c
index b8170ad..1776103 100644
--- a/sound/isa/opti9xx/miro.c
+++ b/sound/isa/opti9xx/miro.c
@@ -1277,7 +1277,7 @@
 		if (mpu_port < 0) {
 			snd_card_free(card);
 			snd_printk(KERN_ERR "unable to find a free MPU401 port\n");
-			return -EBUSY
+			return -EBUSY;
 		}
 	}
 	if (miro->irq == SNDRV_AUTO_IRQ) {