ath9k: Update copyright in all the files

How time flies.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/initvals.h b/drivers/net/wireless/ath9k/initvals.h
index 1d60c37..e2f0a34 100644
--- a/drivers/net/wireless/ath9k/initvals.h
+++ b/drivers/net/wireless/ath9k/initvals.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008 Atheros Communications Inc.
+ * Copyright (c) 2008-2009 Atheros Communications Inc.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above