Rename the _ret() functions

Signed-off-by: TRodziewicz <tomasz.rodziewicz@mobica.com>
diff --git a/tests/suites/test_suite_ctr_drbg.function b/tests/suites/test_suite_ctr_drbg.function
index c3ffe3b..a46f21c 100644
--- a/tests/suites/test_suite_ctr_drbg.function
+++ b/tests/suites/test_suite_ctr_drbg.function
@@ -288,7 +288,7 @@
     /* Call update with too much data (sizeof entropy > MAX(_SEED)_INPUT).
      * Make sure it's detected as an error and doesn't cause memory
      * corruption. */
-    TEST_ASSERT( mbedtls_ctr_drbg_update_ret(
+    TEST_ASSERT( mbedtls_ctr_drbg_update(
                      &ctx, entropy, sizeof( entropy ) ) != 0 );
 
     /* Now enable PR, so the next few calls should all reseed */