mac80211: fix AP buffered multicast frames with queue control and txq

Buffered multicast frames must be passed to the driver directly via
drv_tx instead of going through the txq, otherwise they cannot easily be
scheduled to be sent after DTIM.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 62ad532..664624e 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1247,7 +1247,8 @@
 	struct txq_info *txqi;
 	u8 ac;
 
-	if (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE)
+	if ((info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) ||
+	    (info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
 		goto tx_normal;
 
 	if (!ieee80211_is_data(hdr->frame_control))