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>

sound/oss/pas2_mixer.c

diff --git a/sound/oss/pas2_mixer.c b/sound/oss/pas2_mixer.c
index 4aade53..a0bcb85 100644
--- a/sound/oss/pas2_mixer.c
+++ b/sound/oss/pas2_mixer.c
@@ -1,6 +1,6 @@
 
 /*
- * sound/pas2_mixer.c
+ * sound/oss/pas2_mixer.c
  *
  * Mixer routines for the Pro Audio Spectrum cards.
  */