Refactor the driver to use the new Trusted Services RPC ABI. Remove the
capabilty of handling multiple RPC ABIs based on SP UUID, the scope of
the driver is Trusted Services only so this feature is not needed.
Change the user space interface to get aligned with the requirements of
the new RPC mechanism.

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: I29d4d4a2790568b85e8f2d5f1f631f1dc2c73acb

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: Ifa6ac7db3240cbd85c55a2b69999a453619e53db

Replace the current DebugFS and custom ioctl based FF-A user-space
interface with an implementation which uses the TEE subsystem.
Currently the new TEE driver supports Trusted Services specific
protocol and enables communication with PSA Secure Partitions. The
design allows extending the TEE driver with other protocols in the
future when demand arises.

The main intention of the change is to break away from the
proof-of-concept nature of the previous implementation, coming from
the debug nature of DebugFS (it is disabled in release builds), and
the foreseeable challenges of up-streaming a new user-space API.

Signed-off-by: Balint Dobszay <balint.dobszay@arm.com>
Change-Id: If2a59d5ca15eebeb30dad229fb99207aadc13d93