x86: Fix mangled umlauts

git mergetool has a nasty habit of mangling umlats - fix ones that have
been missed in previous submissions

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.

arch/i386/lib/board.c

@@ -1,6 +1,6 @@
 /*
  * (C) Copyright 2002
- * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
+ * Daniel Engström, Omicron Ceti AB, daniel@omicron.se
  *
  * (C) Copyright 2002
  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.