This should make it clear it's not an external header.
It could be confused with `mmdeviceapi.h`, in particular.
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v2: mmdevapi: Add missing includes and typedef to mmdevdrv.h.
mmdevapi: Add missing includes to mmdevapi_private.h.
mmdevapi: Swap includes order in mmdevapi_private.h, for consistency.
https://gitlab.winehq.org/wine/wine/-/merge_requests/2642