ALSA: Add missing .owner=THIS_MODULE to platform_driver definitions

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/portman2x4.c b/sound/drivers/portman2x4.c
index 3e32bd3..8364855 100644
--- a/sound/drivers/portman2x4.c
+++ b/sound/drivers/portman2x4.c
@@ -829,7 +829,8 @@
 	.probe  = snd_portman_probe,
 	.remove = __devexit_p(snd_portman_remove),
 	.driver = {
-		.name = PLATFORM_DRIVER
+		.name = PLATFORM_DRIVER,
+		.owner	= THIS_MODULE,
 	}
 };