ALSA: usb-audio: fix Yamaha KX quirk

We have to restrict the quirk to interface 0 because the second
interface is not MIDI but HID. Additionally, this product ID is used
by all four KX models, so it is better to read the product name from
the device.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

sound/usb/usbquirks.h

@@ -210,7 +210,7 @@ YAMAHA_DEVICE(0x1042, NULL),
 YAMAHA_DEVICE(0x1043, NULL),
 YAMAHA_DEVICE(0x1044, NULL),
 YAMAHA_DEVICE(0x1045, NULL),
-YAMAHA_DEVICE(0x104e, "KX49"),
+YAMAHA_INTERFACE(0x104e, 0, NULL),
 YAMAHA_DEVICE(0x2000, "DGP-7"),
 YAMAHA_DEVICE(0x2001, "DGP-5"),
 YAMAHA_DEVICE(0x2002, NULL),