tests: Make autogo_join_auto_go_neg more robust

It was possible for this test case to fail if the single attempt of
discovering the peer as part of the scan for join failed. This test case
was useful in combination with another test case:
ap_hs20_fetch_osu autogo_join_auto_go_neg

However, there is now an explicit test case (discovery_after_gas) for
this, so autogo_join_auto_go_neg can be made more robust without losing
testing coverage.

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

tests/hwsim/test_p2p_autogo.py

@@ -532,6 +532,9 @@ def test_autogo_join_auto_go_neg(dev):
     dev[1].flush_scan_cache()
     dev[0].p2p_listen()
     addr = dev[0].p2p_dev_addr()
+    if not dev[1].discover_peer(addr, social=True):
+        raise Exception("Peer not found")
+    dev[1].p2p_stop_find()
     if "OK" not in dev[1].global_request("P2P_CONNECT " + addr + " pbc auto"):
         raise Exception("P2P_CONNECT failed")