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_stackcheck.S b/arch/alpha/lib/dbg_stackcheck.S
index 3c1f3e6..78f6b92 100644
--- a/arch/alpha/lib/dbg_stackcheck.S
+++ b/arch/alpha/lib/dbg_stackcheck.S
@@ -1,5 +1,5 @@
 /*
- * arch/alpha/lib/stackcheck.S
+ * arch/alpha/lib/dbg_stackcheck.S
  * Contributed by Richard Henderson (rth@tamu.edu)
  *
  * Verify that we have not overflowed the stack.  Oops if we have.