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/alpha/lib/dbg_stackkill.S b/arch/alpha/lib/dbg_stackkill.S
index e9f6a9d..c1e40a1 100644
--- a/arch/alpha/lib/dbg_stackkill.S
+++ b/arch/alpha/lib/dbg_stackkill.S
@@ -1,5 +1,5 @@
 /*
- * arch/alpha/lib/killstack.S
+ * arch/alpha/lib/dbg_stackkill.S
  * Contributed by Richard Henderson (rth@cygnus.com)
  *
  * Clobber the balance of the kernel stack, hoping to catch