STM32F429ZI Nucleo LwIP Examples

TCP and UDP Echo Client Example using LwIP Stack (RAW API) for Nucleo-F429ZI

STM32Cube has only one LwIP example for Nucleo-F429ZI (LwIP_HTTP_Server_Netconn_RTOS). But has several examples for STM324x9I_EVAL. TCP and UDP Echo Client was copied from the Eval example and necessary changes were made to fit in the Nucleo board.

Change log:
1. Updated header file names.
2. Changed clock from 25MHz(Eval) to 8MHz(Nucleo).
3. Updated Ethernet interface from MII to RMII.
4. PHY IC was updated to LAN8742A