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/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c
index 9eeef96..2f0b777 100644
--- a/drivers/rtc/rtc-max6902.c
+++ b/drivers/rtc/rtc-max6902.c
@@ -1,4 +1,4 @@
-/* drivers/char/max6902.c
+/* drivers/rtc/rtc-max6902.c
  *
  * Copyright (C) 2006 8D Technologies inc.
  * Copyright (C) 2004 Compulab Ltd.