[POWERPC] Fix a couple of copyright symbols

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/kernel/systbl_chk.c b/arch/powerpc/kernel/systbl_chk.c
index 77824d1..238aa63 100644
--- a/arch/powerpc/kernel/systbl_chk.c
+++ b/arch/powerpc/kernel/systbl_chk.c
@@ -6,7 +6,7 @@
  * Unfortunately, we cannot check for the correct ordering of entries
  * using SYSX().
  *
- * Copyright © IBM Corporation
+ * Copyright © IBM Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License