Add Makefile to make generic DTS files which are available at hardware/nvidia/platform/*/generic-dts. These DTS are mainline compliance. Bug 3860258 Change-Id: I5e8218f7ee7f2ba192fe130ee983480b3c8ea413 Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2804233 Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>