Add the host1x node along with its children to the Tegra20 DTSI. Board-
specific DTS files are expected to enable the available outputs and
complement the device tree with data specific to the hardware.
Signed-off-by: NThierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: NStephen Warren <swarren@nvidia.com>