In the Vybrid Reference Manual Rev. 7 (06/2014) the following registers have been part of chapter 49 (UART):
In Rev. 8 (11/2015) and newer Vybrid Reference Manual those registers are missing.
In Rev. 8 (11/2015) Appendix A: Revision History for VFxxx Controller F-Series Reference Manual most changes are documented. However, there is no UART change mentioned... I assume this was an oversight? Or have they been removed intentionally (issues/not recommended to use or similar)?