[TASK] Remove axi_openmac testPort

Change-Id: Ief4afa8047cc312e04e82b3135c7505ef324097b
[TASK] Add Zynq SoC debug documentation

Using Micorblaze IP-Core in Zynq PL requires a specific work flow with
Xilinx tools, which is documented in Xilinx application note xapp1093.

Change-Id: Ifc468a8599ce90373f07a4ee9dd91c2749d533ec
[TASK] Add known issues about Xilinx Zynq MN

Change-Id: Ife2a84f1f7563ef20c394ae55a0bcd24eb861cdc