nl80211: Allow control port to be disabled with a driver param

This is mainly for testing purposes to allow wpa_supplicant and hostapd
functionality to be tested both with and without using the nl80211
control port which is by default used whenever supported by the driver.
control_port=0 driver parameter will prevent that from happening.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/drivers/driver_nl80211.c

@@ -8006,6 +8006,9 @@ static int nl80211_set_param(void *priv, const char *param)
 		drv->test_use_roc_tx = 1;
 	}
 
+	if (os_strstr(param, "control_port=0"))
+		drv->capa.flags &= ~WPA_DRIVER_FLAGS_CONTROL_PORT;
+
 	return 0;
 }