ALSA: usb-audio: Add quirk flags for JBL Pebbles

JBL Pebbles is a pair of desktop speakers with UAC interface. Its
Playback and Capture mixers use linear volume with val = 0/999/1 and
0/3996/4. Meanwhile, the reported sample rates are truncated to
multiples of 0x100 (i.e., 44100 => 44032), resulting in noisy kmsg, as a
warning message is printed each time a stream is opened.

Add a quirk table entry matching VID/PID=0x05fc/0x0231 and applying
linear volume and sample rate quirk flags, so that it can work properly.

Also note that the volume control knob on device is an incremental
encoder. It does nothing but sends KEY_VOLUMEUP and KEY_VOLUMEDOWN per
rotation, controlling the UAC Playback volume mixer indirectly. Hence,
the linear volume quirk flags also enable the volume control knob to
function properly.

Quirky device sample:

  usb 5-1.1: new full-speed USB device number 12 using xhci_hcd
  usb 5-1.1: New USB device found, idVendor=05fc, idProduct=0231, bcdDevice= 1.00
  usb 5-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
  usb 5-1.1: Product: JBL Pebbles
  usb 5-1.1: Manufacturer: Harman International Industries
  usb 5-1.1: SerialNumber: 1.0.0
  usb-storage 5-1.1:1.0: USB Mass Storage device detected
  scsi host0: usb-storage 5-1.1:1.0
  usb 5-1.1: Found last interface = 1
  usb 5-1.1: 2:1: add audio endpoint 0x5
  usb 5-1.1: Creating new data endpoint #5
  usb 5-1.1: 2:1 Set sample rate 44100, clock 0
  usb 5-1.1: current rate 44032 is different from the runtime rate 44100
  usb 5-1.1: 3:1: add audio endpoint 0x84
  usb 5-1.1: Creating new data endpoint #84
  usb 5-1.1: 3:1 Set sample rate 44100, clock 0
  usb 5-1.1: current rate 44032 is different from the runtime rate 44100
  usb 5-1.1: [2] FU [PCM Playback Switch] ch = 1, val = 0/1/1
  usb 5-1.1: Warning! Unlikely big volume step count (=999), linear volume or wrong cval->res?
  usb 5-1.1: [2] FU [PCM Playback Volume] ch = 2, val = 0/999/1
  usb 5-1.1: [5] FU [Mic Capture Switch] ch = 1, val = 0/1/1
  usb 5-1.1: Warning! Unlikely big volume step count (=999), linear volume or wrong cval->res?
  usb 5-1.1: [5] FU [Mic Capture Volume] ch = 2, val = 0/3996/4
  input: Harman International Industries JBL Pebbles as /devices/pci0000:00/0000:00:08.3/0000:67:00.3/usb5/5-1/5-1.1/5-1.1:1.4/0003:05FC:0231.0018/input/input55
  hid-generic 0003:05FC:0231.0018: input,hidraw2: USB HID v2.01 Device [Harman International Industries JBL Pebbles] on usb-0000:67:00.3-1.1/input4

Signed-off-by: Rong Zhang <i@rong.moe>
Link: https://patch.msgid.link/20260504-uac-jbl-pebbles-v1-1-c888d592a286@rong.moe


Signed-off-by: Takashi Iwai <tiwai@suse.de>