mt76: connac: do not schedule mac_work if the device is not running

Do not run ieee80211_queue_delayed_work for mac work if the worqueue is
not initialized yet

Fixes: b1bd7bb8 ("mt76: connac: unschedule mac_work before going to sleep")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/5bfd36a75799c37b12fcb54d17e77fbc2c7a0558.1619187875.git.lorenzo@kernel.org

drivers/net/wireless/mediatek/mt76/mt7615/mac.c

@@ -1912,6 +1912,7 @@ void mt7615_pm_wake_work(struct work_struct *work)
 			napi_schedule(&dev->mt76.napi[i]);
 		mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
 		mt76_queue_tx_cleanup(dev, dev->mt76.q_mcu[MT_MCUQ_WM], false);
+		if (test_bit(MT76_STATE_RUNNING, &mphy->state))
 			ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
 						     MT7615_WATCHDOG_TIME);
 	}

drivers/net/wireless/mediatek/mt76/mt7921/mac.c

@@ -1404,6 +1404,7 @@ void mt7921_pm_wake_work(struct work_struct *work)
 			napi_schedule(&dev->mt76.napi[i]);
 		mt76_connac_pm_dequeue_skbs(mphy, &dev->pm);
 		mt7921_tx_cleanup(dev);
+		if (test_bit(MT76_STATE_RUNNING, &mphy->state))
 			ieee80211_queue_delayed_work(mphy->hw, &mphy->mac_work,
 						     MT7921_WATCHDOG_TIME);
 	}