Documentation: devicetree: Document Adapteva boards

We're about to add a device tree for the Parallella board.

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add Parallella device tree

This allows to boot the Adapteva Parallella board to serial console.

Cc: Andreas Olofsson <andreas@adapteva.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Update deprecated xuartps clock names

Avoids deprecation warning messages.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Documentation: devicetree: Xilinx VDMA specification fix

The specification requires xlnx,data-width, but example and driver use
xlnx,datawidth. Change the specification to match the implementation.

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add VDMA to Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add USB to Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add QSPI for Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
Documentation: devicetree: Fix ADI AXI SPDIF specification

The specification requires compatible = "adi,axi-spdif-1.00.a" but
driver and example and file name indicate "adi,axi-spdif-tx-1.00.a".
Change the specification to match the implementation.

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add DMAC for Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add SPDIF for Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
ARM: dts: zynq: Add AXI clkgen for Parallella

Signed-off-by: Andreas Färber <afaerber@suse.de>
Override fclk-enable

Signed-off-by: Andreas Färber <afaerber@suse.de>