Stop checking against reference vector in pk_rsa_encrypt_test_vec when USE_PSA_CRYPTO

The pk_rsa_encrypt_test_vec() reference vector is calculated while using
mbedtls_test_rnd_pseudo_rand rng source, but since the RNG souce can't
be controlled when USE_PSA_CRYPTO is enabled we can't get the same
result.

The pk_rsa_encrypt_test_vec() fails when switching to mbedtls_test_rnd_std_rand
as rng source.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 61447af..c6533c7 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -812,7 +812,10 @@
                             output, &olen, sizeof( output ),
                             mbedtls_test_rnd_pseudo_rand, &rnd_info ) == ret );
     TEST_ASSERT( olen == result->len );
+#if !defined(MBEDTLS_USE_PSA_CRYPTO)
+    // When using PSA crypto, RNG isn't controllable, so reference vector can't be used
     TEST_ASSERT( memcmp( output, result->x, olen ) == 0 );
+#endif
 
 exit:
     mbedtls_pk_free( &pk );