Adding IP block to custom peripheral in Xilinx EDK

1. In mpd file, set OPTION STYLE = MIX.
2. Create the folder netlist in pcores folder. The folder pcore should contain the following subfolders: data, devl, hdl, netlist.
3. Create bbd file and save in the folder data. An example of bbd file:
   FILES
   blackbox1.ngc, blackbox2.ngc, blackbox3.edn
4. Put all the netlist files in the folder netlist.