mac80211: Remove superfluous is_multicast_ether_addr() call

Remove superfluous call and use locally stored previous result.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/tx.c

@@ -1981,7 +1981,7 @@ netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
 	 * EAPOL frames from the local station.
 	 */
 	if (unlikely(!ieee80211_vif_is_mesh(&sdata->vif) &&
-		     !is_multicast_ether_addr(hdr.addr1) && !authorized &&
+		     !multicast && !authorized &&
 		     (cpu_to_be16(ethertype) != sdata->control_port_protocol ||
 		      !ether_addr_equal(sdata->vif.addr, skb->data + ETH_ALEN)))) {
 #ifdef CONFIG_MAC80211_VERBOSE_DEBUG