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/midi_synth.c

@@ -1,5 +1,5 @@
 /*
- * sound/midi_synth.c
+ * sound/oss/midi_synth.c
  *
  * High level midi sequencer manager for dumb MIDI interfaces.
  */