Update authorship

arch/arm/src/kl/kl_clockconfig.c

@@ -3,7 +3,8 @@
  * arch/arm/src/chip/kl_clockconfig.c
  *
  *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *   Author: Alan Carvalho de Assis <acassis@gmail.com>
+ *           Gregory Nutt <gnutt@nuttx.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions