sh: comment tidying for sh64->sh migration.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/lib64/c-checksum.c b/arch/sh/lib64/c-checksum.c
index 053137a..5dfbd8b 100644
--- a/arch/sh/lib64/c-checksum.c
+++ b/arch/sh/lib64/c-checksum.c
@@ -1,12 +1,9 @@
 /*
- * arch/sh64/lib/c-checksum.c
+ * arch/sh/lib64/c-checksum.c
  *
  * This file contains network checksum routines that are better done
  * in an architecture-specific manner due to speed..
  */
-
-#undef DEBUG
-
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/kernel.h>