ASoC: sound/ad73311: add missing __devexit marker

This fixes the following warning:

sound/soc/codecs/ad73311.c:50:12: warning: 'ad73311_remove' defined but not used
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/soc/codecs/ad73311.c

@@ -47,7 +47,7 @@ static int ad73311_probe(struct platform_device *pdev)
 			&soc_codec_dev_ad73311, &ad73311_dai, 1);
 }
 
-static int ad73311_remove(struct platform_device *pdev)
+static int __devexit ad73311_remove(struct platform_device *pdev)
 {
 	snd_soc_unregister_codec(&pdev->dev);
 	return 0;