Remove gatesgarth from LAYERSERIES_COMPAT
Remove gatesgarth from LAYERSERIES_COMPAT

Remove gatesgarth as it is not maintained, tested or supported.

Signed-off-by: John Toomey <ccf6bc1da034a98a2f5664569c91e34fa67b86e5@xilinx.com>
Signed-off-by: Mark Hatle <41765ab18fb75e64ff0efe27f2ebcdb2d6f7e44e@xilinx.com>

OpenAMP/meta-openamp,OpenAMP/meta-openamp