Sort out RSA mechanisms
* PSS needs to be parametrized by a hash.
* Don't use `_MGF1` in the names of macros for OAEP and PSS. No one
ever uses anything else.
* Add brief documentation for the RSA signature mechanisms.
diff --git a/tests/suites/test_suite_psa_crypto.data b/tests/suites/test_suite_psa_crypto.data
index 5bdc718..d318678 100644
--- a/tests/suites/test_suite_psa_crypto.data
+++ b/tests/suites/test_suite_psa_crypto.data
@@ -503,7 +503,7 @@
signature_size:PSA_KEY_TYPE_RSA_KEYPAIR:1024:PSA_ALG_RSA_PKCS1V15_SIGN(PSA_ALG_SHA_256):128
PSA signature size: RSA keypair, 1024 bits, PSS
-signature_size:PSA_KEY_TYPE_RSA_KEYPAIR:1024:PSA_ALG_RSA_PSS_MGF1:128
+signature_size:PSA_KEY_TYPE_RSA_KEYPAIR:1024:PSA_ALG_RSA_PSS( PSA_ALG_SHA_256 ):128
PSA signature size: RSA keypair, 1023 bits, PKCS#1 v1.5 raw
signature_size:PSA_KEY_TYPE_RSA_KEYPAIR:1023:PSA_ALG_RSA_PKCS1V15_SIGN_RAW:128