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/ahb.c b/drivers/net/wireless/ath9k/ahb.c
index 7f2c3a0..361ace1 100644
--- a/drivers/net/wireless/ath9k/ahb.c
+++ b/drivers/net/wireless/ath9k/ahb.c
@@ -19,9 +19,7 @@
 #include <linux/nl80211.h>
 #include <linux/platform_device.h>
 #include <linux/ath9k_platform.h>
-#include "core.h"
-#include "reg.h"
-#include "hw.h"
+#include "ath9k.h"
 
 /* return bus cachesize in 4B word units */
 static void ath_ahb_read_cachesize(struct ath_softc *sc, int *csz)