Convert source files to UTF-8 encoding

Most QEMU files either are pure ASCII or use UTF-8.
Convert some files which still used ISO-8859-1 to UTF-8.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/hw/ds1225y.c b/hw/ds1225y.c
index 59d224e..7aa0832 100644
--- a/hw/ds1225y.c
+++ b/hw/ds1225y.c
@@ -1,7 +1,7 @@
 /*
  * QEMU NVRAM emulation for DS1225Y chip
  *
- * Copyright (c) 2007-2008 Hervé Poussineau
+ * Copyright (c) 2007-2008 Hervé Poussineau
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal