Correct spelling of licensed

Correct typos of "licenced" to "licensed".

Reviewed-by: Stefan Weil <weil@mail.berlios.de>
Reviewed-by: Andreas F=E4rber <andreas.faerber@web.de>
Signed-off-by: Matthew Fernandez <matthew.fernandez@gmail.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/a9mpcore.c b/hw/a9mpcore.c
index b5e5328..6f108f4 100644
--- a/hw/a9mpcore.c
+++ b/hw/a9mpcore.c
@@ -4,7 +4,7 @@
  * Copyright (c) 2009 CodeSourcery.
  * Written by Paul Brook
  *
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
  */
 
 /* 64 external IRQ lines.  */