ALSA: Add Yamaha KX49 (USB MIDI controller) to usbquirks.h

This patch is for the Yamaha USB MIDI controller KX49.
http://www.yamahasynth.com/products/kx/index.html


It has a 3-port MIDI interface and an HID interface (it has a tiny
keyboard subset).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>