tls: add new symbol for generic TLS 1.2 and 1.3 support

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/include/mbedtls/ssl_ciphersuites.h b/include/mbedtls/ssl_ciphersuites.h
index 843a0e4..910c678 100644
--- a/include/mbedtls/ssl_ciphersuites.h
+++ b/include/mbedtls/ssl_ciphersuites.h
@@ -292,6 +292,8 @@
 #define MBEDTLS_KEY_EXCHANGE_WITH_CERT_ENABLED
 #endif
 
+/* Key exchanges in either TLS 1.2 or 1.3 which are using an ECDSA
+ * signature */
 #if defined(MBEDTLS_KEY_EXCHANGE_ECDHE_ECDSA_ENABLED) || \
     defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
 #define MBEDTLS_KEY_EXCHANGE_WITH_ECDSA_ANY_ENABLED
@@ -319,6 +321,12 @@
 #define MBEDTLS_KEY_EXCHANGE_ECDSA_CERT_REQ_ALLOWED_ENABLED
 #endif
 
+/* ECDSA required for certificates in either TLS 1.2 or 1.3 */
+#if defined(MBEDTLS_KEY_EXCHANGE_ECDSA_CERT_REQ_ALLOWED_ENABLED) || \
+    defined(MBEDTLS_SSL_TLS1_3_KEY_EXCHANGE_MODE_EPHEMERAL_ENABLED)
+#define MBEDTLS_KEY_EXCHANGE_ECDSA_CERT_REQ_ANY_ALLOWED_ENABLED
+#endif
+
 /* Key exchanges involving server signature in ServerKeyExchange */
 #if defined(MBEDTLS_KEY_EXCHANGE_DHE_RSA_ENABLED)       || \
     defined(MBEDTLS_KEY_EXCHANGE_ECDHE_RSA_ENABLED)     || \