psa: driver wrappers: Add generate key unit test with no fallback

Add a test in test_suite_psa_crypto_driver_wrappers that
when accelerators do not support the generation of a key
and there is no software fallback, the key generation
fails with the PSA_ERROR_NOT_SUPPORTED error code.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tests/suites/test_suite_psa_crypto_driver_wrappers.data b/tests/suites/test_suite_psa_crypto_driver_wrappers.data
index 1fd449f..14f84c0 100644
--- a/tests/suites/test_suite_psa_crypto_driver_wrappers.data
+++ b/tests/suites/test_suite_psa_crypto_driver_wrappers.data
@@ -38,6 +38,10 @@
 depends_on:MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR
 generate_key:PSA_ERROR_NOT_SUPPORTED:"":PSA_SUCCESS
 
+generate_key through transparent driver: fallback not available
+depends_on:!MBEDTLS_PSA_BUILTIN_KEY_TYPE_ECC_KEY_PAIR
+generate_key:PSA_ERROR_NOT_SUPPORTED:"":PSA_ERROR_NOT_SUPPORTED
+
 generate_key through transparent driver: error
 generate_key:PSA_ERROR_GENERIC_ERROR:"":PSA_ERROR_GENERIC_ERROR