[ALSA] usb-audio - rename QUIRK_MIDI_MOTU to QUIRK_MIDI_RAW

USB generic driver
Rename the protocol used by the MOTU FastLane to 'raw' because it might
be useful with other devices, and there are other MOTU interfaces that
do not use this protocol.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index aee3c0f..3eaa08e 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -2970,7 +2970,7 @@
 	case QUIRK_MIDI_YAMAHA:
 	case QUIRK_MIDI_MIDIMAN:
 	case QUIRK_MIDI_NOVATION:
-	case QUIRK_MIDI_MOTU:
+	case QUIRK_MIDI_RAW:
 	case QUIRK_MIDI_EMAGIC:
 		return snd_usb_create_midi_interface(chip, iface, quirk);
 	case QUIRK_COMPOSITE: