DEBUG: try to enable TCP on OpenThread

Signed-off-by: Stefan Schmidt <stefan.schmidt@huawei.com>

prj.conf

@@ -88,6 +88,10 @@ CONFIG_OPENTHREAD_JOINER_AUTOSTART=y
 CONFIG_OPENTHREAD_JOINER_PSKD="J01NU5"
 CONFIG_OPENTHREAD_SLAAC=y
 
+# TCP for MQTT
+CONFIG_OPENTHREAD_TCP_ENABLE=y
+CONFIG_OPENTHREAD_CLI_TCP_ENABLE=y
+
 # Enable diagnostic module, uncomment if needed
 #CONFIG_OPENTHREAD_DIAG=y