drivers: amd: Add ASU support

Add support for the AMD Application Security Unit (ASU), the on-chip
Hardware Security Module (HSM) for Versal Gen 2.
The ASU manages all device-level security services

drivers: amd: Add ASU support

Add support for the AMD Application Security Unit (ASU), the on-chip
Hardware Security Module (HSM) for Versal Gen 2.
The ASU manages all device-level security services for user
applications, extending beyond accelerator-centric tasks.
Its firmware also exposes several software-based cryptographic
primitives, including:
- Key transfer
- RSA authentication (multiple padding schemes)
- HMAC
- Key Derivation Function (KDF)
- Key wrap / unwrap

Co-developed-by: Harsh Jain <h.jain@amd.com>
Signed-off-by: Harsh Jain <h.jain@amd.com>
Signed-off-by: Akshay Belsare <akshay.belsare@amd.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

show more ...