ASoC: sn95031: decorate function with __devexit_p()

According to the comments in include/linux/init.h:

"Pointers to __devexit functions must use __devexit_p(function_name), the
wrapper will insert either the function_name or NULL, depending on the config
options."

Fix this issue in codecs sn95031.

Signed-off-by: Lu Guanqun <guanqun.lu@intel.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/sn95031.c b/sound/soc/codecs/sn95031.c
index 2a30eae..f74d497 100644
--- a/sound/soc/codecs/sn95031.c
+++ b/sound/soc/codecs/sn95031.c
@@ -925,7 +925,7 @@
 		.owner		= THIS_MODULE,
 	},
 	.probe		= sn95031_device_probe,
-	.remove		= sn95031_device_remove,
+	.remove		= __devexit_p(sn95031_device_remove),
 };
 
 static int __init sn95031_init(void)