mbm: update state after enabling the device

plugins/mm-modem-mbm.c

@@ -324,6 +324,11 @@ mbm_enable_done (MMSerialPort *port,
 
     if (error)
         info->error = g_error_copy (error);
+    else {
+        /* We're enabled; update our state */
+        mm_generic_gsm_update_enabled_state (MM_GENERIC_GSM (info->modem),
+                                             MM_MODEM_STATE_REASON_NONE);
+    }
     mm_callback_info_schedule (info);
 }