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/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c
index a041367..aafca18 100644
--- a/arch/ia64/kernel/irq_ia64.c
+++ b/arch/ia64/kernel/irq_ia64.c
@@ -1,5 +1,5 @@
 /*
- * linux/arch/ia64/kernel/irq.c
+ * linux/arch/ia64/kernel/irq_ia64.c
  *
  * Copyright (C) 1998-2001 Hewlett-Packard Co
  *	Stephane Eranian <eranian@hpl.hp.com>