mt76: clear CCA timer stats in mt76x02_edcca_init

Avoid triggering too early
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt76x02_mac.c

@@ -919,6 +919,9 @@ void mt76x02_edcca_init(struct mt76x02_dev *dev, bool enable)
 		}
 	}
 	mt76x02_edcca_tx_enable(dev, true);
+
+	/* clear previous CCA timer value */
+	mt76_rr(dev, MT_ED_CCA_TIMER);
 }
 EXPORT_SYMBOL_GPL(mt76x02_edcca_init);