Add an example app that opens a session with the devices pseudo-TA
and enumerates the available devices (prints their UUIDs only).
The example showcases:
- opening the OP-TEE client driver
- printing its version
- opening a session
- allocating shared memory
- registering shared memory
- invoking a function to the TA referencing the shared memory
- closing the session
Enabled with CONFIG_EXAMPLES_OPTEE.
Signed-off-by: George Poulios <gpoulios@census-labs.com>