mtd: Update copyright notices

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/mtd/ubi-user.h b/include/mtd/ubi-user.h
index 466a832..c0d47ad 100644
--- a/include/mtd/ubi-user.h
+++ b/include/mtd/ubi-user.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) International Business Machines Corp., 2006
+ * Copyright © International Business Machines Corp., 2006
  *
  * 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