* Wrap-up more CDC functions. Note these were moved to common code
upstream, so in the future we'll only need to wrap one or two functions.
* Recover from text ringbuf overflow by resetting it.
* More efficient text ringbuf read/write.
- Rename options more consistently.
- Add OMV prefix to every config option.
- Replace the ST-specific DCMI prefix with CSI.
- Remove the clock source defined in every header to a common enum.
- Remove obsolete board config options.
Prior to this update, each port had to be patched to call TinyUSB
debugging function. Now these wrappers will call the port's functions
if debugging is not enabled.