arm: zynq: dts: Add a unified drm/v4l2 dts

Unified dts for drm kms/v4l2 pipeline.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
arm: zynq: dts: Remove dts for pipeline testings

Remove dts files used for testing pipelines with differnt formats and
configurations.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>