arm: config: xilinx_zynq_drm: Enable V4L test drivers

Enable V4L test drivers and VIVI which generates the test pattern
to be captured by v4l applications.

Signed-off-by: hyun woo kwon <hyunk@xilinx.com>
arm: config: xilinx_zynq_drm: Enable USB video class

Enable USB Video Class support.

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