hw: Fix spelling (licenced->licensed)

New code introduced old misspellings.
Signed-off-by: NStefan Weil <sw@weilnetz.de>
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>

hw/lm4549.c

@@ -4,7 +4,7 @@
  * Copyright (c) 2011
  * Written by Mathieu Sonet - www.elasticsheep.com
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  *
  * *****************************************************************
  *

hw/lm4549.h

@@ -4,7 +4,7 @@
  * Copyright (c) 2011
  * Written by Mathieu Sonet - www.elasticsheep.com
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  *
  * *****************************************************************
  */

hw/pl041.c

@@ -4,7 +4,7 @@
  * Copyright (c) 2011
  * Written by Mathieu Sonet - www.elasticsheep.com
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  *
  * *****************************************************************
  *

hw/pl041.h

@@ -4,7 +4,7 @@
  * Copyright (c) 2011
  * Written by Mathieu Sonet - www.elasticsheep.com
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  *
  * *****************************************************************
  */

hw/pl041.hx

@@ -4,7 +4,7 @@
  * Copyright (c) 2011
  * Written by Mathieu Sonet - www.elasticsheep.com
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  *
  * *****************************************************************
  */