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/asm-xtensa/pgtable.h b/include/asm-xtensa/pgtable.h
index a47cc73..b431893 100644
--- a/include/asm-xtensa/pgtable.h
+++ b/include/asm-xtensa/pgtable.h
@@ -1,5 +1,5 @@
 /*
- * linux/include/asm-xtensa/page.h
+ * linux/include/asm-xtensa/pgtable.h
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version2 as