fix file specification in comments

Many files include the filename at the beginning, serveral used a wrong one.

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/sound/oss/ad1848_mixer.h b/sound/oss/ad1848_mixer.h
index f9231c6..2cf719b 100644
--- a/sound/oss/ad1848_mixer.h
+++ b/sound/oss/ad1848_mixer.h
@@ -1,5 +1,5 @@
 /*
- * sound/ad1848_mixer.h
+ * sound/oss/ad1848_mixer.h
  *
  * Definitions for the mixer of AD1848 and compatible codecs.
  */