Refactor/ports xplained common dlmstp (#665)

* Refactored ports/xplained to use common DLMSTP module to enable extended frames

* Added floating point compares in cases where they don't exist in math library

ports/xplained/netport.c

@@ -1,34 +1,11 @@
 /**
  * @file
- * @author Steve Karg
- * @date 2016
  * @brief Network port objects, customize for your use
- *
- * @section DESCRIPTION
- *
- * The Network Port object provides access to the configuration
+ * @details The Network Port object provides access to the configuration
  * and properties of network ports of a device.
- *
- * @section LICENSE
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to
- * the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
- * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
- * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
- * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * @author Steve Karg <skarg@users.sourceforge.net>
+ * @date 2014
+ * @copyright SPDX-License-Identifier: MIT
  */
 #include <stdbool.h>
 #include <stdint.h>