arm64: tegra: Audio graph sound card for Jetson TX2 NX

Enable support for audio-graph based sound card on Jetson TX2 NX.
Following I/O interfaces are enabled.
  * I2S1 and I2S3
  * DMIC1 and DMIC2

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