mt76: remove PS_NULLFUNC_STACK capability

remove IEEE80211_HW_PS_NULLFUNC_STACK capability from mt76_phy_init
routine since 802.11 ps is not currently supported by any devices and it
will conflict with mt7663 ps fw support
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mac80211.c

@@ -294,7 +294,6 @@ mt76_phy_init(struct mt76_dev *dev, struct ieee80211_hw *hw)
 		hw->max_tx_fragments = 16;
 
 	ieee80211_hw_set(hw, SIGNAL_DBM);
-	ieee80211_hw_set(hw, PS_NULLFUNC_STACK);
 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
 	ieee80211_hw_set(hw, SUPPORTS_RC_TABLE);
 	ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);