xrt: adding libffi and elfutils dependency for ps kernel support
xrt: adding libffi and elfutils dependency for ps kernel support

Signed-off-by: ch vamshi krishna <0a781f61f59a26049c6da7da42ec6f623a4e1c97@xilinx.com>
Signed-off-by: Mark Hatle <41765ab18fb75e64ff0efe27f2ebcdb2d6f7e44e@xilinx.com>

Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx,Xilinx/meta-xilinx