wl1271_scan_send
ret = wl1271_scan_send(wl, wlvif, band, false, rate);
ret = wl1271_scan_send(wl, wlvif, band, true, rate);
ret = wl1271_scan_send(wl, wlvif, band, false, rate);
ret = wl1271_scan_send(wl, wlvif, band, true, rate);