drivers: tee: optee: Introducing OP-TEE driver implementation

This includes the TEE driver api implementation for OP-TEE.
It provides an interface to the OP-TEE TrustZone from the Normal space
to start sessions and request functions of the TA.

- targets ARM and ARM64;
- use SMC to connect to OP-TEE;
- accepts requests on privileged and unprivileged device.

Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@epam.com>