mt76: mt7921: always wake the device in mt7921_remove_interface

Make sure the mcu is not in sleep mode before sending mcu messages in
mt7921_remove_interface routine.

Fixes: 1d8efc74 ("mt76: mt7921: introduce Runtime PM support")
Co-developed-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Co-developed-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Leon Yen <leon.yen@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

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

@@ -354,12 +354,12 @@ static void mt7921_remove_interface(struct ieee80211_hw *hw,
 	if (vif == phy->monitor_vif)
 		phy->monitor_vif = NULL;
 
+	mt7921_mutex_acquire(dev);
 	mt76_connac_free_pending_tx_skbs(&dev->pm, &msta->wcid);
 	mt76_connac_mcu_uni_add_dev(&dev->mphy, vif, &mvif->sta.wcid, false);
 
 	rcu_assign_pointer(dev->mt76.wcid[idx], NULL);
 
-	mt7921_mutex_acquire(dev);
 	dev->mt76.vif_mask &= ~BIT(mvif->mt76.idx);
 	phy->omac_mask &= ~BIT_ULL(mvif->mt76.omac_idx);
 	mt7921_mutex_release(dev);