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/sb_mixer.c b/sound/oss/sb_mixer.c
index ccb21d4..238e2cf 100644
--- a/sound/oss/sb_mixer.c
+++ b/sound/oss/sb_mixer.c
@@ -1,5 +1,5 @@
 /*
- * sound/sb_mixer.c
+ * sound/oss/sb_mixer.c
  *
  * The low level mixer driver for the Sound Blaster compatible cards.
  */