mt76: mt76x02: fix TSF sync mode

MT_BEACON_TIME_CFG_SYNC_MODE needs to be set for AP mode, according to the
documentation. For other modes it should be irrelevant in this case.
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x02_util.c

@@ -679,9 +679,9 @@ void mt76x02_init_beacon_config(struct mt76x02_dev *dev)
 	}
 
 	mt76_clear(dev, MT_BEACON_TIME_CFG, (MT_BEACON_TIME_CFG_TIMER_EN |
-					     MT_BEACON_TIME_CFG_SYNC_MODE |
 					     MT_BEACON_TIME_CFG_TBTT_EN |
 					     MT_BEACON_TIME_CFG_BEACON_TX));
+	mt76_set(dev, MT_BEACON_TIME_CFG, MT_BEACON_TIME_CFG_SYNC_MODE);
 	mt76_wr(dev, MT_BCN_BYPASS_MASK, 0xffff);
 
 	for (i = 0; i < 8; i++)