wifi: mt76: mt7921: fix the wrong rate selected in fw for the chanctx driver

The variable band should be determined by the ieee80211_chanctx_conf when
the driver is a kind of chanctx one e.g mt7921 and mt7922 driver so we
added the extension to mt76_connac2_mac_tx_rate_val and
mt76_connac_get_he_phy_cap for the firmware can select the proper rate.

Fixes: 41ac53c8 ("wifi: mt76: mt7921: introduce chanctx support")
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Tested-by: David Ruth <druth@chromium.org>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76_connac_mcu.c

@@ -841,7 +841,9 @@ void mt76_connac_mcu_sta_tlv(struct mt76_phy *mphy, struct sk_buff *skb,
 			     struct ieee80211_vif *vif,
 			     u8 rcpi, u8 sta_state)
 {
-	struct cfg80211_chan_def *chandef = &mphy->chandef;
+	struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
+	struct cfg80211_chan_def *chandef = mvif->ctx ?
+					    &mvif->ctx->def : &mphy->chandef;
 	enum nl80211_band band = chandef->chan->band;
 	struct mt76_dev *dev = mphy->dev;
 	struct sta_rec_ra_info *ra_info;
@@ -1381,7 +1383,10 @@ EXPORT_SYMBOL_GPL(mt76_connac_get_phy_mode_ext);
 const struct ieee80211_sta_he_cap *
 mt76_connac_get_he_phy_cap(struct mt76_phy *phy, struct ieee80211_vif *vif)
 {
-	enum nl80211_band band = phy->chandef.chan->band;
+	struct mt76_vif *mvif = (struct mt76_vif *)vif->drv_priv;
+	struct cfg80211_chan_def *chandef = mvif->ctx ?
+					    &mvif->ctx->def : &phy->chandef;
+	enum nl80211_band band = chandef->chan->band;
 	struct ieee80211_supported_band *sband;
 
 	sband = phy->hw->wiphy->bands[band];