Convert ISO-8859 files to UTF-8

There was a mix of UTF-8 and ISO-8859 files in the U-Boot source
tree, which could cause issues with the patchwork review system.
This commit converts all ISO-8859 files to UTF-8.

Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index ddde83c..7f1fc18 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -3,7 +3,7 @@
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
 # (C) Copyright 2002
-# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
+# Daniel Engström, Omicron Ceti AB, daniel@omicron.se.
 #
 # See file CREDITS for list of people who contributed to this
 # project.