x86: Fix mangled umlauts

git mergetool has a nasty habit of mangling umlats - fix ones that have
been missed in previous submissions
diff --git a/arch/i386/cpu/start.S b/arch/i386/cpu/start.S
index 829468f..ab9338a 100644
--- a/arch/i386/cpu/start.S
+++ b/arch/i386/cpu/start.S
@@ -1,7 +1,7 @@
 /*
  *  U-boot - i386 Startup Code
  *
- *  Copyright (c) 2002	Omicron Ceti AB, Daniel Engstr�m <denaiel@omicron.se>
+ *  Copyright (c) 2002	Omicron Ceti AB, Daniel Engström <denaiel@omicron.se>
  *
  * See file CREDITS for list of people who contributed to this
  * project.