arm64: tegra: Move audio IOMMU properties to ADMAIF node

The ADMAIF node represents the device that accesses memory in the Tegra
audio subsystem, so that's where the iommus and interconnects properties
should reside. Move them out of the sound card node and into the ADMAIF
node to properly reflect the memory data path.

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