Remove compiler warning for non-P2P builds

wpa_supplicant/ctrl_iface.c

@@ -292,7 +292,9 @@ static int wpa_supplicant_ctrl_iface_wps_pbc(struct wpa_supplicant *wpa_s,
 					     char *cmd)
 {
 	u8 bssid[ETH_ALEN], *_bssid = bssid;
+#ifdef CONFIG_P2P
 	u8 p2p_dev_addr[ETH_ALEN], *_p2p_dev_addr = NULL;
+#endif /* CONFIG_P2P */
 
 	if (cmd == NULL || os_strcmp(cmd, "any") == 0) {
 		_bssid = NULL;