station: set handshake offload if required

If IWD is connecting to a SAE/WPA3 BSS and Auth/Assoc commands
are not supported the only option is SAE offload. At this point
network_connect should have verified that the extended feature
for SAE offload exists so we can simply enable offload if these
commands are not supported.

src/station.c

@@ -979,6 +979,16 @@ static struct handshake_state *station_handshake_setup(struct station *station,
 				goto no_psk;
 
 			handshake_state_set_passphrase(hs, passphrase);
+
+			/*
+			 * TODO: This check isn't strictly correct since
+			 * some drivers may support EXTERNAL_AUTH but since
+			 * wiphy_can_connect takes this into account IWD should
+			 * have already rejected the connection if this was the
+			 * case.
+			 */
+			if (!wiphy_supports_cmds_auth_assoc(wiphy))
+				hs->offload = true;
 		} else {
 			const uint8_t *psk = network_get_psk(network);