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/hw.c b/drivers/net/wireless/ath9k/hw.c
index 00ed44a..075ddc5 100644
--- a/drivers/net/wireless/ath9k/hw.c
+++ b/drivers/net/wireless/ath9k/hw.c
@@ -17,10 +17,7 @@
 #include <linux/io.h>
 #include <asm/unaligned.h>
 
-#include "core.h"
-#include "hw.h"
-#include "reg.h"
-#include "phy.h"
+#include "ath9k.h"
 #include "initvals.h"
 
 static int btcoex_enable;