P2P: Use join SSID in the skip-PD cases

It was already possible to limit join operation to accept only a
specific SSID. However, this constraint was not used when starting a P2P
Client interface as a WPS Enrollee without going through a Provision
Discovery exchange.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/p2p_supplicant.c

@@ -4925,7 +4925,8 @@ static void wpas_p2p_scan_res_join(struct wpa_supplicant *wpa_s,
 
 start:
 	/* Start join operation immediately */
-	wpas_p2p_join_start(wpa_s, 0, NULL, 0);
+	wpas_p2p_join_start(wpa_s, 0, wpa_s->p2p_join_ssid,
+			    wpa_s->p2p_join_ssid_len);
 }