ALSA: usb-audio: Enable .product_name override for Emagic, Unitor 8.

The Emagic Unitor 8 does not provide iManufacturer and iProduct fields
in its device descriptor. These fields are used by alsa to make build the
device name. Thus uncomment the .product-name in the quirks-table.

Without this change the device shows up as 'USB Device 0x86a:0x01'.

Output of lsusb and amidi:
https://gist.github.com/ensonic/7820a102e91f31575be355da2b6b33bcSigned-off-by: Stefan Sauer <ensonic@google.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/quirks-table.h

@@ -2422,7 +2422,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 	USB_DEVICE(0x086a, 0x0001),
 	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
 		.vendor_name = "Emagic",
-		/* .product_name = "Unitor8", */
+		.product_name = "Unitor8",
 		.ifnum = 2,
 		.type = QUIRK_MIDI_EMAGIC,
 		.data = & (const struct snd_usb_midi_endpoint_info) {