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/arch/xtensa/mm/tlb.c b/arch/xtensa/mm/tlb.c
index d3bd3bf..0fefb866 100644
--- a/arch/xtensa/mm/tlb.c
+++ b/arch/xtensa/mm/tlb.c
@@ -1,5 +1,5 @@
 /*
- * arch/xtensa/mm/mmu.c
+ * arch/xtensa/mm/tlb.c
  *
  * Logic that manipulates the Xtensa MMU.  Derived from MIPS.
  *