Rename new_session_ticket state

Both client and server side use
`MBEDTLS_SSL_NEW_SESSION_TICKET` now

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ssl_msg.c b/library/ssl_msg.c
index 4d73068..9c20794 100644
--- a/library/ssl_msg.c
+++ b/library/ssl_msg.c
@@ -5304,7 +5304,7 @@
 
     MBEDTLS_SSL_DEBUG_MSG( 3, ( "NewSessionTicket received" ) );
     mbedtls_ssl_handshake_set_state( ssl,
-                                     MBEDTLS_SSL_CLIENT_NEW_SESSION_TICKET );
+                                     MBEDTLS_SSL_NEW_SESSION_TICKET );
 
     return( MBEDTLS_ERR_SSL_WANT_READ );
 }