wifi: mt76: mt7996: increase txq memory limit to 32 MiB

Prior to this change, both 2G and 6G radios would fall back to the
mac80211 default of 4MB which is not enough for high data rates.

Signed-off-by: Chad Monroe <chad@monroe.io>
Link: https://patch.msgid.link/acfe2e25768b414518be2db22b1d3ba6f5db6fa1.1765203249.git.chad@monroe.io
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7996/init.c

@@ -538,6 +538,7 @@ mt7996_init_wiphy(struct ieee80211_hw *hw, struct mtk_wed_device *wed)
 	ieee80211_hw_set(hw, SUPPORTS_MULTI_BSSID);
 
 	hw->max_tx_fragments = 4;
+	wiphy->txq_memory_limit = 32 << 20; /* 32 MiB */
 
 	/* init led callbacks */
 	if (IS_ENABLED(CONFIG_MT76_LEDS)) {