[ALSA] usb-audio: ignore Hercules DJ Console mixer errors

USB generic driver
Add a quirk entry for the Hercules DJ Console to ignore timeouts on
some mixer control transfers.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

sound/usb/usbmixer_maps.c

@@ -237,6 +237,11 @@ static struct usbmix_ctl_map usbmix_ctl_maps[] = {
 		.map = audigy2nx_map,
 		.selector_map = audigy2nx_selectors,
 	},
+	{
+		/* Hercules DJ Console */
+		.id = USB_ID(0x06f8, 0xd002),
+		.ignore_ctl_error = 1,
+	},
 	{
 		.id = USB_ID(0x08bb, 0x2702),
 		.map = linex_map,