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/kernel/head.S b/arch/alpha/kernel/head.S
index 1e2a62a..e27d23c 100644
--- a/arch/alpha/kernel/head.S
+++ b/arch/alpha/kernel/head.S
@@ -1,5 +1,5 @@
 /*
- * alpha/boot/head.S
+ * arch/alpha/kernel/head.S
  *
  * initial boot stuff.. At this point, the bootloader has already
  * switched into OSF/1 PAL-code, and loaded us at the correct address