mac80211: move csa_chandef to sdata

There is no reason why we should have only one channel switch
announcement at a time for a single phy.  When support for channel
switch with multiple contexts and multiple vifs per context is
implemented, we will need the chandef data for each vif.  Move the
csa_chandef structure to sdata to prepare for this.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
[Fixed compilation with mesh]
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/mesh.c b/net/mac80211/mesh.c
index e0538b9..330d1f7 100644
--- a/net/mac80211/mesh.c
+++ b/net/mac80211/mesh.c
@@ -956,7 +956,7 @@
 				IEEE80211_MAX_QUEUE_MAP,
 				IEEE80211_QUEUE_STOP_REASON_CSA);
 
-	sdata->local->csa_chandef = params.chandef;
+	sdata->csa_chandef = params.chandef;
 	sdata->vif.csa_active = true;
 
 	ieee80211_bss_info_change_notify(sdata, err);