early data: rename configuration function

Rename mbedtls_ssl_tls13_conf_early_data as
mbedtls_ssl_conf_early_data since in the future this may not be
specific to TLS 1.3.

Signed-off-by: Yanray Wang <yanray.wang@arm.com>
diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index c9110de..88bba8c 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -2000,8 +2000,8 @@
  * \warning This interface is experimental and may change without notice.
  *
  */
-void mbedtls_ssl_tls13_conf_early_data(mbedtls_ssl_config *conf,
-                                       int early_data_enabled);
+void mbedtls_ssl_conf_early_data(mbedtls_ssl_config *conf,
+                                 int early_data_enabled);
 
 #if defined(MBEDTLS_SSL_SRV_C)
 /**