mt76: fix setting chan->max_power

When setting chan->max_power after registering the wiphy, chan->max_reg_power
needs to be used as a limit
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7603/init.c

@@ -494,7 +494,7 @@ mt7603_init_txpower(struct mt7603_dev *dev,
 
 	for (i = 0; i < sband->n_channels; i++) {
 		chan = &sband->channels[i];
-		chan->max_power = target_power;
+		chan->max_power = min_t(int, chan->max_reg_power, target_power);
 		chan->orig_mpwr = target_power;
 	}
 }

drivers/net/wireless/mediatek/mt76/mt76x0/init.c

@@ -279,8 +279,9 @@ mt76x0_init_txpower(struct mt76x02_dev *dev,
 		mt76x0_get_tx_power_per_rate(dev, chan, &t);
 		mt76x0_get_power_info(dev, chan, &tp);
 
-		chan->max_power = (mt76x02_get_max_rate_power(&t) + tp) / 2;
-		chan->orig_mpwr = chan->max_power;
+		chan->orig_mpwr = (mt76x02_get_max_rate_power(&t) + tp) / 2;
+		chan->max_power = min_t(int, chan->max_reg_power,
+					chan->orig_mpwr);
 	}
 }
 

drivers/net/wireless/mediatek/mt76/mt76x2/init.c

@@ -173,13 +173,14 @@ void mt76x2_init_txpower(struct mt76x02_dev *dev,
 		mt76x2_get_power_info(dev, &txp, chan);
 		mt76x2_get_rate_power(dev, &t, chan);
 
-		chan->max_power = mt76x02_get_max_rate_power(&t) +
+		chan->orig_mpwr = mt76x02_get_max_rate_power(&t) +
 				  txp.target_power;
-		chan->max_power = DIV_ROUND_UP(chan->max_power, 2);
+		chan->orig_mpwr = DIV_ROUND_UP(chan->orig_mpwr, 2);
 
 		/* convert to combined output power on 2x2 devices */
-		chan->max_power += 3;
-		chan->orig_mpwr = chan->max_power;
+		chan->orig_mpwr += 3;
+		chan->max_power = min_t(int, chan->max_reg_power,
+					chan->orig_mpwr);
 	}
 }
 EXPORT_SYMBOL_GPL(mt76x2_init_txpower);