arm64: tegra: Add NVENC and NVJPG nodes for Tegra186 and Tegra194

Populate the device-tree nodes for NVENC and NVJPG Host1x engines on
Tegra186 and Tegra194.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>