ALSA: scarlett2: Add support for Solo, 2i2, and 4i4 Gen 4

Add new Focusrite Scarlett Gen 4 USB IDs, notification arrays, config
sets, and device info data.
Signed-off-by: Geoffrey D. Bennett <g@b4.vu>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/b33526d3b7a56bb2c86aa4eb2137a415bd23f1ce.1703612638.git.g@b4.vu

include/uapi/sound/scarlett2.h

 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 /*
  *   Focusrite Scarlett 2 Protocol Driver for ALSA
- *   (including Scarlett 2nd Gen, 3rd Gen, Clarett USB, and Clarett+
- *   series products)
+ *   (including Scarlett 2nd Gen, 3rd Gen, 4th Gen, Clarett USB, and
+ *   Clarett+ series products)
  *
  *   Copyright (c) 2023 by Geoffrey D. Bennett <g at b4.vu>
  */

sound/usb/mixer_quirks.c

@@ -3447,6 +3447,9 @@ int snd_usb_mixer_apply_create_quirk(struct usb_mixer_interface *mixer)
 	case USB_ID(0x1235, 0x8213): /* Focusrite Scarlett 8i6 3rd Gen */
 	case USB_ID(0x1235, 0x8214): /* Focusrite Scarlett 18i8 3rd Gen */
 	case USB_ID(0x1235, 0x8215): /* Focusrite Scarlett 18i20 3rd Gen */
+	case USB_ID(0x1235, 0x8218): /* Focusrite Scarlett Solo 4th Gen */
+	case USB_ID(0x1235, 0x8219): /* Focusrite Scarlett 2i2 4th Gen */
+	case USB_ID(0x1235, 0x821a): /* Focusrite Scarlett 4i4 4th Gen */
 	case USB_ID(0x1235, 0x8206): /* Focusrite Clarett 2Pre USB */
 	case USB_ID(0x1235, 0x8207): /* Focusrite Clarett 4Pre USB */
 	case USB_ID(0x1235, 0x8208): /* Focusrite Clarett 8Pre USB */