ASoC: adau17x1: Correct typos in file headers

Signed-off-by: Andreas Irestål <andire@axis.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/adau1781.c b/sound/soc/codecs/adau1781.c
index fde9068..bc1bb56 100644
--- a/sound/soc/codecs/adau1781.c
+++ b/sound/soc/codecs/adau1781.c
@@ -1,5 +1,5 @@
 /*
- * Driver for ADAU1781/ADAU1781 codec
+ * Driver for ADAU1381/ADAU1781 codec
  *
  * Copyright 2011-2013 Analog Devices Inc.
  * Author: Lars-Peter Clausen <lars@metafoo.de>