mac80211: Use a cfg80211_chan_def in ieee80211_hw_conf_chan

Drivers that don't use chanctxes cannot perform VHT association because
they still use a "backward compatibility" pair of {ieee80211_channel,
nl80211_channel_type} in ieee80211_conf and ieee80211_local.

Signed-off-by: Karl Beldan <karl.beldan@rivierawaves.com>
[fix kernel-doc]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/drivers/net/wireless/rtlwifi/base.c b/drivers/net/wireless/rtlwifi/base.c
index 99c5cea..0e7866d 100644
--- a/drivers/net/wireless/rtlwifi/base.c
+++ b/drivers/net/wireless/rtlwifi/base.c
@@ -691,7 +691,7 @@
 	int rate_idx;
 
 	if (false == isht) {
-		if (IEEE80211_BAND_2GHZ == hw->conf.channel->band) {
+		if (IEEE80211_BAND_2GHZ == hw->conf.chandef.chan->band) {
 			switch (desc_rate) {
 			case DESC92_RATE1M:
 				rate_idx = 0;
@@ -1365,7 +1365,7 @@
 		rtlpriv->cfg->ops->update_rate_tbl(hw, sta, 0);
 
 		info->control.rates[0].idx = 0;
-		info->band = hw->conf.channel->band;
+		info->band = hw->conf.chandef.chan->band;
 		rtlpriv->intf_ops->adapter_tx(hw, sta, skb, &tcb_desc);
 	}
 err_free: