ath9k: Fix 'offchannel' in ath_softc

Finally move the 'offchannel' instance in ath_softc
inside a CONFIG_ATH9K_CHANNEL_CONTEXT cage. The offchannel
usage in ath9k_calculate_iter_data() is closed off with
an ifdef for now, since the state/opmode calculation is
common for both the channel context mode and the normal mode.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index 8767aa7..02664b3 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -925,6 +925,7 @@
 	struct ath_gen_timer *p2p_ps_timer;
 	struct ath_vif *p2p_ps_vif;
 	struct ath_chanctx_sched sched;
+	struct ath_offchannel offchannel;
 #endif
 
 	unsigned long driver_data;
@@ -948,7 +949,6 @@
 	struct ath_chanctx *cur_chan;
 	struct ath_chanctx *next_chan;
 	spinlock_t chan_lock;
-	struct ath_offchannel offchannel;
 
 #ifdef CONFIG_MAC80211_LEDS
 	bool led_registered;