Add missing logic for accelerated ECB under MBEDTLS_PSA_CRYPTO_CONFIG

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/include/mbedtls/config_psa.h b/include/mbedtls/config_psa.h
index 5609fa6..5bf1f78 100644
--- a/include/mbedtls/config_psa.h
+++ b/include/mbedtls/config_psa.h
@@ -401,7 +401,8 @@
 #endif
 #endif /* PSA_WANT_ALG_XTS */
 
-#if defined(PSA_WANT_ALG_ECB_NO_PADDING)
+#if defined(PSA_WANT_ALG_ECB_NO_PADDING) &&     \
+    !defined(MBEDTLS_PSA_ACCEL_ALG_ECB_NO_PADDING)
 #define MBEDTLS_PSA_BUILTIN_ALG_ECB_NO_PADDING 1
 #endif