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/drivers/rtc/s3c24x0_rtc.c b/drivers/rtc/s3c24x0_rtc.c
index 7f02f05..9667939 100644
--- a/drivers/rtc/s3c24x0_rtc.c
+++ b/drivers/rtc/s3c24x0_rtc.c
@@ -1,6 +1,6 @@
 /*
  * (C) Copyright 2003
- * David Müller ELSOFT AG Switzerland. d.mueller@elsoft.ch
+ * David Müller ELSOFT AG Switzerland. d.mueller@elsoft.ch
  *
  * See file CREDITS for list of people who contributed to this
  * project.