ath5k: allocate ath5k_hw prior to initializing hw

We can propagate better errors upon failed hw initialization,
and set up the ath_common structure for attach purposes. This
will become important once we start using the ath_common
for read/write ops.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath.h b/drivers/net/wireless/ath/ath.h
index 38be427..be68cb8 100644
--- a/drivers/net/wireless/ath/ath.h
+++ b/drivers/net/wireless/ath/ath.h
@@ -51,7 +51,7 @@
 	u8 curbssid[ETH_ALEN];
 	u8 bssidmask[ETH_ALEN];
 	struct ath_regulatory regulatory;
-	struct ath_ops *ops;
+	const struct ath_ops *ops;
 };
 
 struct sk_buff *ath_rxbuf_alloc(struct ath_common *common,