staging: rtl8188eu: use is_multicast_ether_addr in rtw_sta_mgt.c

Use is_multicast_ether_addr instead of custom IS_MCAST in
core/rtw_sta_mgt.c.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8188eu/core/rtw_sta_mgt.c

@@ -414,7 +414,7 @@ struct sta_info *rtw_get_stainfo(struct sta_priv *pstapriv, u8 *hwaddr)
 	if (!hwaddr)
 		return NULL;
 
-	if (IS_MCAST(hwaddr))
+	if (is_multicast_ether_addr(hwaddr))
 		addr = bc_addr;
 	else
 		addr = hwaddr;