[mbed-tls] Using the "psa_verify_message" function

The specification of the "psa_verify_message" function is simple enough: pass a key ID, an algorithm ID, the data that were signed, the signature received from the peer, and receive a status. There is just one tiny problem: in the application, the algorithm ID is specified as a 16 bit TLS SignatureScheme (https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#tls-sig...), which is not quite the same as "psa_algorithm_t". Is there a simple way to covert from TLS SignatureScheme to PSA ALgorithm identifier? Maybe a two columns table?

-- Christian Huitema