staging: r8188eu: use ieee80211 helper to check for beacon

Use the ieee80211_is_beacon helper to check if the incoming frame is a
beacon frame.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220515155401.352742-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/hal/rtl8188e_rxdesc.c

@@ -128,9 +128,7 @@ void update_recvframe_phyinfo_88e(struct recv_frame *precvframe, struct phy_stat
 				 (!memcmp(get_da(wlanhdr),
 				  myid(&padapter->eeprompriv), ETH_ALEN));
 
-	pkt_info.bPacketBeacon = pkt_info.bPacketMatchBSSID &&
-				 (GetFrameSubType(wlanhdr) == WIFI_BEACON);
-
+	pkt_info.bPacketBeacon = pkt_info.bPacketMatchBSSID && ieee80211_is_beacon(fc);
 	if (pkt_info.bPacketBeacon) {
 		if (check_fwstate(&padapter->mlmepriv, WIFI_STATION_STATE))
 			sa = padapter->mlmepriv.cur_network.network.MacAddress;