wifi: mt76: use chainmask for power delta calculation

The power gain value is related to total TX path, so change the
calculation to use per-phy chainmask.
Signed-off-by: Allen Ye <allen.ye@mediatek.com>
Signed-off-by: Shayne Chen <shayne.chen@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -381,7 +381,7 @@ s8 mt76_get_rate_power_limits(struct mt76_phy *phy,
 	if (!np)
 		return target_power;
 
-	txs_delta = mt76_get_txs_delta(np, hweight8(phy->antenna_mask));
+	txs_delta = mt76_get_txs_delta(np, hweight16(phy->chainmask));
 
 	val = mt76_get_of_array(np, "rates-cck", &len, ARRAY_SIZE(dest->cck));
 	mt76_apply_array_limit(dest->cck, ARRAY_SIZE(dest->cck), val,

drivers/net/wireless/mediatek/mt76/mac80211.c

@@ -1548,7 +1548,7 @@ int mt76_get_txpower(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 		     int *dbm)
 {
 	struct mt76_phy *phy = hw->priv;
-	int n_chains = hweight8(phy->antenna_mask);
+	int n_chains = hweight16(phy->chainmask);
 	int delta = mt76_tx_power_nss_delta(n_chains);
 
 	*dbm = DIV_ROUND_UP(phy->txpower_cur + delta, 2);

drivers/net/wireless/mediatek/mt76/mt7915/mcu.h

@@ -519,7 +519,7 @@ static inline s8
 mt7915_get_power_bound(struct mt7915_phy *phy, s8 txpower)
 {
 	struct mt76_phy *mphy = phy->mt76;
-	int n_chains = hweight8(mphy->antenna_mask);
+	int n_chains = hweight16(mphy->chainmask);
 
 	txpower = mt76_get_sar_power(mphy, mphy->chandef.chan, txpower * 2);
 	txpower -= mt76_tx_power_nss_delta(n_chains);