Zynq: fix build with OMX 2019.2
These couple of patches are needed to build with latest version of Zynq's OMX headers: https://github.com/Xilinx/vcu-omx-il/tree/release-2019.2
These couple of patches are needed to build with latest version of Zynq's OMX headers: https://github.com/Xilinx/vcu-omx-il/tree/release-2019.2