replace early data permission check

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ssl_tls13_server.c b/library/ssl_tls13_server.c
index 7a02c71..dd2bb69 100644
--- a/library/ssl_tls13_server.c
+++ b/library/ssl_tls13_server.c
@@ -1845,9 +1845,7 @@
 
     }
 
-    if (mbedtls_ssl_session_get_ticket_flags(
-            ssl->session_negotiate,
-            MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_EARLY_DATA) == 0) {
+    if (!mbedtls_ssl_session_ticket_allow_early_data(ssl->session_negotiate)) {
         MBEDTLS_SSL_DEBUG_MSG(
             1,
             ("EarlyData: rejected, early_data not allowed in ticket "
@@ -3223,8 +3221,7 @@
     unsigned char *p = buf;
     *out_len = 0;
 
-    if (mbedtls_ssl_session_get_ticket_flags(
-            ssl->session, MBEDTLS_SSL_TLS1_3_TICKET_ALLOW_EARLY_DATA) == 0) {
+    if (!mbedtls_ssl_session_ticket_allow_early_data(ssl->session)) {
         MBEDTLS_SSL_DEBUG_MSG(
             4, ("early_data not allowed, skip early_data extension in "
                 "NewSessionTicket"));