[ALSA] Fix a typo in __dev* changes in portman2x4.c

Fix a typo in the last __dev* changes in portman2x4.c.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/drivers/portman2x4.c b/sound/drivers/portman2x4.c
index b43d4c9..b2d0ba4 100644
--- a/sound/drivers/portman2x4.c
+++ b/sound/drivers/portman2x4.c
@@ -824,7 +824,7 @@
 
 static struct platform_driver snd_portman_driver = {
 	.probe  = snd_portman_probe,
-	.remove = __dev_exit_p(snd_portman_remove),
+	.remove = __devexit_p(snd_portman_remove),
 	.driver = {
 		.name = PLATFORM_DRIVER
 	}