ath9k: Make start/stop operations aware of virtual wiphys

Instead of always going through initialization/deinitialization steps,
do this only for the first/last wiphy to not break the other wiphys.

Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/ath9k.h b/drivers/net/wireless/ath9k/ath9k.h
index bc25075..cb9cb72 100644
--- a/drivers/net/wireless/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath9k/ath9k.h
@@ -627,6 +627,7 @@
 	struct ath_softc *sc; /* shared for all virtual wiphys */
 	struct ieee80211_hw *hw;
 	enum ath_wiphy_state {
+		ATH_WIPHY_INACTIVE,
 		ATH_WIPHY_ACTIVE,
 		ATH_WIPHY_PAUSING,
 		ATH_WIPHY_PAUSED,
@@ -708,5 +709,6 @@
 int ath9k_wiphy_unpause(struct ath_wiphy *aphy);
 int ath9k_wiphy_select(struct ath_wiphy *aphy);
 void ath9k_wiphy_chan_work(struct work_struct *work);
+bool ath9k_wiphy_started(struct ath_softc *sc);
 
 #endif /* ATH9K_H */