arm64: tegra: Add RT5658 device entry

Jetson AGX Xavier has an on-board audio codec whicn is connected to
Tegra I2S1 interface. Hence add corresponding device node for the
audio codec.

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