[FIX] Fix AXI host interface ipcore PDO GUI settings

Remove RPDO and TPDO GUI parameters and add single PDO parameter
to be in line with the ipcore scripts.

Change-Id: Idb9247f106b6907dbd0059fa0404da1e8eca7bee
[FIX] Fix Xilinx host interface header file generation

This fix is necessary to avoid C compiler warnings caused by the
generated host interface header file.

Change-Id: I221d65bfac04c31979425bd8b90f7ecf8ab5f4e1