[meta-xilinx] external-xilinx-toolchain:Remove toolchain support

[Nathan Rossi]

On Thu, Apr 28, 2016 at 10:43 AM, Manjukumar Matha
<manjukumar.harthikote-matha at xilinx.com> wrote:
> This patch removes the Xilinx SDK toolchain support in meta-xilinx BSP layer.
> A new distro layer called meta-petalinux will be available as of May 9th 2016.
> The recipes to support the Xilinx SDK toolchain will added to this distro
> layer.
>
> Signed-off-by: Manjukumar Matha <manjukumar.harthikote-matha at xilinx.com>

Applied.

Once the meta-petalinux layer is available I will update the README to
recommend users that need external toolchain support look there. I
assume it will be published to github.com/Xilinx?

Thanks,
Nathan