- Bring ep0 serivice into xua_buffer select (make control mem) (DONE)
- Tidy feeback endpoint (DONE)
- Input path + FIFO (DONE)
- Function prototypes into includes
- Single input/ouput format (DONE)
- Get UAC1 / FS working (DONE)
- Optimised EP buffer (either triple block or block FIFO) 
- Fix output gain issue
- Add timer to xua_buffer to prepare for exchange with audio (remove backpressure to audio) (WONT DO)
- Adaptive endpoint EP and descriptors
- Adpative clock control
- Switchable MICS using define
- DFU
- Combinable EP0
- Interrupt EP0 option
- Control processing