Adjust dependencies for EC extensions
The Thread spec says we need those for EC J-PAKE too.
However, we won't be using the information, so we can skip the parsing
functions in an EC J-PAKE only config; keep the writing functions in order to
comply with the spec.
diff --git a/include/mbedtls/ssl_internal.h b/include/mbedtls/ssl_internal.h
index 73279a5..e9d06da 100644
--- a/include/mbedtls/ssl_internal.h
+++ b/include/mbedtls/ssl_internal.h
@@ -168,7 +168,8 @@
#if defined(MBEDTLS_ECDH_C)
mbedtls_ecdh_context ecdh_ctx; /*!< ECDH key exchange */
#endif
-#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C)
+#if defined(MBEDTLS_ECDH_C) || defined(MBEDTLS_ECDSA_C) || \
+ defined(MBEDTLS_ECJPAKE_C)
const mbedtls_ecp_curve_info **curves; /*!< Supported elliptic curves */
#endif
#if defined(MBEDTLS_KEY_EXCHANGE__SOME__PSK_ENABLED)