ath9k: Header file cleanup

Split the core header files into manageable pieces.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/regd.c b/drivers/net/wireless/ath9k/regd.c
index fe08a4f..819feb9 100644
--- a/drivers/net/wireless/ath9k/regd.c
+++ b/drivers/net/wireless/ath9k/regd.c
@@ -16,9 +16,7 @@
 
 #include <linux/kernel.h>
 #include <linux/slab.h>
-#include "core.h"
-#include "hw.h"
-#include "regd.h"
+#include "ath9k.h"
 #include "regd_common.h"
 
 /*