[meta-xilinx] Restructuring of meta-xilinx layer

[Manjukumar Harthikote Matha]

Hi All,

We want to restructure meta-xilinx layer to encompass all the layers coming from Xilinx. 
The proposal is the following for Rocko/master:
meta-xilinx
	->meta-xilinx-bsps (current meta-xilinx)
	->meta-xilinx-contrib

In the next release we will add some more layers such as meta-petalinux, meta-xilinx-tools, etc. It will look like
meta-xilinx
	->meta-xilinx-bsps (current meta-xilinx)
	->meta-petalinux
	->meta-xilinx-tools
	->meta-xilinx-contrib

There will be some movement of recipes from meta-xilinx-bsps to meta-xilinx-contrib. Patches will be sent to mailing list on any recipes movement.
This will provide one clone to get all the required meta layers from Xilinx for a complete solution, and the users can blacklist any layer which they don't want to use.
This will enables us to help our vendors/partners to add their reference designs, board definitions etc.

Please let us know your feedback. We plan to get this done no later than 11/20.

Thanks,
Manju