dt-bindings: usb: tegra-xudc: Add Tegra194 XUSB controller support

Extend the Tegra XUSB controller device tree binding with Tegra194
support.

Signed-off-by: Nagarjuna Kristam <nkristam@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Felipe Balbi <balbi@kernel.org>