dt-bindings: xilinx: zynq: Move Paralella board to Xilinx

Move the Adapteva Parallela board to Xilinx dt-bindings,
as it's based on a Zynq SoC from Xilinx

Signed-off-by: Luis Araneda <luaraneda@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>