This patch adds the appropriate macros, tests and codec entries to decode and encode the following instructions: RDFFR .B RDFFR .B, /Z RDFFRS .B, /Z SETFFR WRFFR .B
The First Fault register is currently not part of the machine state (mcxtx_api.h). Handling of the FFR in the core and the API will be added in later patches.
Issue: #3044