Add '(C)' where it's missing (for consistency reasons)

Corresponding to flashrom svn r136 and coreboot v2 svn r2768.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
diff --git a/flash.h b/flash.h
index 6acbb43..e27b0bf 100644
--- a/flash.h
+++ b/flash.h
@@ -1,9 +1,9 @@
 /*
  * This file is part of the flashrom project.
  *
- * Copyright 2000 Silicon Integrated System Corporation
- * Copyright 2000 Ronald G. Minnich <rminnich@gmail.com>
- * Copyright 2005-2007 coresystems GmbH <stepan@coresystems.de>
+ * Copyright (C) 2000 Silicon Integrated System Corporation
+ * Copyright (C) 2000 Ronald G. Minnich <rminnich@gmail.com>
+ * Copyright (C) 2005-2007 coresystems GmbH <stepan@coresystems.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by