doc: Add Sierraware's documentation
gitignore for OpenVirtualization build
zynq: add ZC702 support

    - Add the drivers for the Xilinx zynq ZC702.
    - Includes patch that makes the Ethernet interface available when the L2
      cache is enabled. This issue affects other versions of Open
      Virtualization. This patch has been developed by Xilinx
zynq: make scripts, bootram, dtb and bootwrapper