iwlwifi: move virtual interface pointer into context

iwlwifi occasionally needs to find the virtual
interface pointer to give it to mac80211, but right
now it only keeps one. Move it into the context so
that we can keep one pointer each.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c
index c155816..1d6a46d 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965.c
@@ -1462,7 +1462,7 @@
 	u32 tsf_low;
 	u8 switch_count;
 	u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
-	struct ieee80211_vif *vif = priv->vif;
+	struct ieee80211_vif *vif = ctx->vif;
 	band = priv->band == IEEE80211_BAND_2GHZ;
 
 	is_ht40 = is_ht40_channel(ctx->staging.flags);