Tune up the Thread mini config
diff --git a/configs/config-thread.h b/configs/config-thread.h
index 9196d8f..9ba8b84 100644
--- a/configs/config-thread.h
+++ b/configs/config-thread.h
@@ -38,6 +38,7 @@
#define MBEDTLS_HAVE_ASM
/* mbed TLS feature support */
+#define MBEDTLS_AES_ROM_TABLES
#define MBEDTLS_ECP_DP_SECP256R1_ENABLED
#define MBEDTLS_ECP_NIST_OPTIM
#define MBEDTLS_KEY_EXCHANGE_ECJPAKE_ENABLED
@@ -69,7 +70,13 @@
#define MBEDTLS_SSL_CLI_C
#define MBEDTLS_SSL_SRV_C
#define MBEDTLS_SSL_TLS_C
-#define MBEDTLS_VERSION_C
+
+/* Save RAM by adjusting to our exact needs */
+#define MBEDTLS_ECP_MAX_BITS 256
+#define MBEDTLS_ENTROPY_MAX_SOURCES 2
+
+/* Save ROM and a few bytes of RAM by specifying our own ciphersuite list */
+#define MBEDTLS_SSL_CIPHERSUITES MBEDTLS_TLS_ECJPAKE_WITH_AES_128_CCM_8
#if defined(TARGET_LIKE_MBED)
#include "mbedtls/target_config.h"