arm64: tegra: Enable ACONNECT, ADMA and AGIC on Jetson Nano

These devices are required for audio sub system and current patch
ensures probe path of these devices gets tested. Later sound card
support would be added which can use these devices at runtime.

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