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/memset.S b/arch/alpha/lib/memset.S
index 8ff6e7e..311b8cf 100644
--- a/arch/alpha/lib/memset.S
+++ b/arch/alpha/lib/memset.S
@@ -1,5 +1,5 @@
 /*
- * linux/arch/alpha/memset.S
+ * linux/arch/alpha/lib/memset.S
  *
  * This is an efficient (and small) implementation of the C library "memset()"
  * function for the alpha.