[PATCH 0/6] MR9295: mmdevapi: Add a SW synth MIDI device.

[Anton Baskanov (＠baskanov)]

This is an alternative approach to !7233: instead of creating an actual driver, just add a SW synth device in `mmdevapi`.

Other differences from !7233:
- Get rid of `struct swmidi` and put everything in global variables.
- Use static initialization for `cs`, remove `swmidi_init()` and `swmidi_exit()`.

Whole series for reference: https://gitlab.winehq.org/baskanov/wine/-/tree/mmdevapi-swmidi?ref_type=head...