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

Hello,

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. I've submitted Pioneer DJM-900NXS2 support patches back in 2020, but someone has removed set_format_quirk function for DJM-900NXS2 model. The playback and capture do not work, quirks.c needs to be patched. The patch is attached, please add.

Signed-off-by: Dmitry Panchenko dmitry@d-systems.ee