ALSA: usb-audio: Add Pioneer DJ DJM-900NXS2 support

[Dmitry Panchenko | d-Systems]

Pioneer DJ DJM-900NXS2 is a widely used DJ mixer with 2 audio USB
interfaces. Both have a MIDI controller, 10 playback and 12 capture
channels. Audio endpoints are vendor-specific and 3 files need to be
patched. All playback and capture channels work fine with all supported
sample rates (44.1k, 48k, 96k). Patches are attached.

Signed-off-by: Dmitry Panchenko <dmitry at d-systems.ee>

--
Kind regards,
Dmitry Panchenko

d-Systems Ltd
Lai 6, Tartu 51005, Estonia
www.d-systems.ee

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