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/include/linux/writeback.h b/include/linux/writeback.h
index 4f4d98a..a341c80 100644
--- a/include/linux/writeback.h
+++ b/include/linux/writeback.h
@@ -1,5 +1,5 @@
 /*
- * include/linux/writeback.h.
+ * include/linux/writeback.h
  */
 #ifndef WRITEBACK_H
 #define WRITEBACK_H