Fix compiler warning: unreachable code

Signed-off-by: Sergey <sergio_nsk@yahoo.de>
diff --git a/library/psa_crypto_driver_wrappers.c b/library/psa_crypto_driver_wrappers.c
index 48ad6d5..6156385 100644
--- a/library/psa_crypto_driver_wrappers.c
+++ b/library/psa_crypto_driver_wrappers.c
@@ -1060,8 +1060,9 @@
             }
 
             return status;
-#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
+#else /* MBEDTLS_PSA_BUILTIN_CIPHER */
             return PSA_ERROR_NOT_SUPPORTED;
+#endif /* MBEDTLS_PSA_BUILTIN_CIPHER */
 
             /* Add cases for opaque driver here */
 #if defined(PSA_CRYPTO_ACCELERATOR_DRIVER_PRESENT)