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/kernel/pci.c b/arch/xtensa/kernel/pci.c
index 8709f82..45571cc 100644
--- a/arch/xtensa/kernel/pci.c
+++ b/arch/xtensa/kernel/pci.c
@@ -1,5 +1,5 @@
 /*
- * arch/xtensa/pcibios.c
+ * arch/xtensa/kernel/pci.c
  *
  * PCI bios-type initialisation for PCI machines
  *