drivers: adsd3500: nvidia: L4T_36_4_4: configs: add kernel defconfig for ADSD3500 on L4T 36.4.4

- Add a default kernel configuration for the ADSD3500 platform based on NVIDIA L4T 36.4.4.
- This defconfig provides a known-good baseline for building and deploying the kernel on ADSD3500 systems.

Signed-off-by: Sivasubramanaiyan Padmanaban <sivasubramaniyan.padmanaban@analog.com>

Author: SPadmana95