ath9k: Merge ath_hal and ath_hal_5416 structures

Finally, merge these structures and have a single
HW specific data structure.

Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/debug.c b/drivers/net/wireless/ath9k/debug.c
index daca5ce..800ad59 100644
--- a/drivers/net/wireless/ath9k/debug.c
+++ b/drivers/net/wireless/ath9k/debug.c
@@ -44,7 +44,7 @@
 			     size_t count, loff_t *ppos)
 {
 	struct ath_softc *sc = file->private_data;
-	struct ath_hal *ah = sc->sc_ah;
+	struct ath_hw *ah = sc->sc_ah;
 	char buf[1024];
 	unsigned int len = 0;
 	u32 val[ATH9K_NUM_DMA_DEBUG_REGS];