* Allow UART access to ROM and WRAM for SNI
* [SNI] SRAM and controller register support
* keep file definitions in files.qip
* fix SDRAM timing
* further SDRAM optimization
* add a protocol version number to SNI command handler
* sdram: move raw_req_test off the critical path
* sni: fix issue with WRAM writes to SA-1 games
* Address review feedback