ALSA: Add missing .owner=THIS_MODULE to platform_driver definitions

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/mtpav.c b/sound/drivers/mtpav.c
index 7693079..cad73af 100644
--- a/sound/drivers/mtpav.c
+++ b/sound/drivers/mtpav.c
@@ -759,7 +759,8 @@
 	.probe		= snd_mtpav_probe,
 	.remove		= __devexit_p(snd_mtpav_remove),
 	.driver		= {
-		.name	= SND_MTPAV_DRIVER
+		.name	= SND_MTPAV_DRIVER,
+		.owner	= THIS_MODULE,
 	},
 };