arm64: defconfig: Enable NVIDIA VRS PSEQ RTC

arm64: defconfig: Enable NVIDIA VRS PSEQ RTC

Enable NVIDIA VRS (Voltage Regulator Specification) RTC device module.
It provides functionality to get/set system time, retain system time
across boot, wake system from suspend and shutdown state.

Supported platforms:
- NVIDIA Jetson AGX Orin Developer Kit
- NVIDIA IGX Orin Development Kit
- NVIDIA Jetson Orin NX Developer Kit
- NVIDIA Jetson Orin Nano Developer Kit

Signed-off-by: Shubhi Garg <shgarg@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>