P2P: Clear P2PS provision state on P2P flush

Otherwise, if a P2PS provision is incomplete before the flush, it can
cause incorrect provision responses to be sent out.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>

src/p2p/p2p.c

@@ -3022,6 +3022,8 @@ void p2p_flush(struct p2p_data *p2p)
 	os_free(p2p->after_scan_tx);
 	p2p->after_scan_tx = NULL;
 	p2p->ssid_set = 0;
+	p2ps_prov_free(p2p);
+	p2p_reset_pending_pd(p2p);
 }