powerpc/mpc83xx: fix copyright string in serdes.c

The misspelling of "semiconductor" causes some internal copyright analysis
tools to complain.

Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>

arch/powerpc/cpu/mpc83xx/serdes.c

@@ -1,7 +1,7 @@
 /*
  * Freescale SerDes initialization routine
  *
- * Copyright (C) 2007,2011 Freescale Semicondutor, Inc.
+ * Copyright 2007,2011 Freescale Semiconductor, Inc.
  * Copyright (C) 2008 MontaVista Software, Inc.
  *
  * Author: Li Yang <leoli@freescale.com>