mt76: mt76x0: remove redundant chandef copy

We set dev->mt76.chandef in mt76_set_channel() already.
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -944,7 +944,6 @@ int mt76x0_phy_set_channel(struct mt76x02_dev *dev,
 	freq1 = chandef->center_freq1;
 	channel = chandef->chan->hw_value;
 	rf_bw_band = (channel <= 14) ? RF_G_BAND : RF_A_BAND;
-	dev->mt76.chandef = *chandef;
 
 	switch (chandef->width) {
 	case NL80211_CHAN_WIDTH_40: