media: xilinx: Add AXI4 stream switch driver

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
media: xilinx: Make links configurable

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[DEBUG] media: xilinx: vtc: Add interrupt support

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[DEBUG] media: xilinx: Add register read/write debug to TPG and VTC

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[DEBUG] media: xilinx: Add debugging messages

Trace VTC and TPG start/stop and print the TPG status when VTC
interrupts occur.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[DEBUG] dma: xilinx: vdma: Add debugging messages

Print all register accesses and trace several operations.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>