PKCS12: always use MD light

Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
diff --git a/tests/suites/test_suite_pkcs12.function b/tests/suites/test_suite_pkcs12.function
index ab51e02..65722d0 100644
--- a/tests/suites/test_suite_pkcs12.function
+++ b/tests/suites/test_suite_pkcs12.function
@@ -32,6 +32,8 @@
     size_t salt_len = 0;
     size_t key_size = key_size_arg;
 
+    MD_PSA_INIT();
+
     if (password_usage == USE_GIVEN_INPUT) {
         password = password_arg->x;
     }
@@ -65,6 +67,6 @@
 
 exit:
     mbedtls_free(output_data);
-
+    MD_PSA_DONE();
 }
 /* END_CASE */