[PATCH v2] Bluetooth: btusb: Add USB ID 13d3:3626 for RTL8851BE

Teach btusb to recognize another IMC Networks / Realtek RTL8851BE
Bluetooth radio variant.

Without BTUSB_REALTEK, the device enumerates and HCI comes up, but
btrtl never loads rtl8851bu_fw.bin, so discovery finds no devices.

/sys/kernel/debug/usb/devices reports for this device:

T:  Bus=01 Lev=01 Prnt=01 Port=10 Cnt=02 Dev#=  3 Spd=12   MxCh= 0
D:  Ver= 1.00 Cls=e0(wlcon) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=13d3 ProdID=3626 Rev= 0.00
S:  Manufacturer=Realtek
S:  Product=Bluetooth Radio
S:  SerialNumber=00e04c000001
C:* #Ifs= 2 Cfg#= 1 Atr=e0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=1ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=e0(wlcon) Sub=01 Prot=01 Driver=btusb
E:  Ad=03(O) Atr=01(Isoc) MxPS=   0 Ivl=1ms
E:  Ad=83(I) Atr=01(Isoc) MxPS=   0 Ivl=1ms

Tested on Dell Precision 7820 (Fedora 44, kernel 7.2.4) with the
combo RTL8851BE Wi-Fi/BT card. After the quirk, dmesg shows:

  Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000b
  lmp_ver=0c lmp_subver=8851
  Bluetooth: hci0: RTL: loading rtl_bt/rtl8851bu_fw.bin
  Bluetooth: hci0: RTL: fw version 0x048ad230

and LE discovery/pairing works (Logitech M720 Triathlon).

Signed-off-by: Martin Luker-Brown <redacted>

v2: Wrap long dmesg line in the commit message so checkpatch/gitlint
    stay within the 75/80 character limits.

---
 drivers/bluetooth/btusb.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 83d122de5..91e739c96 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c

@@ -549,6 +549,7 @@ static const struct usb_device_id quirks_table[] = {
 	{ USB_DEVICE(0x0bda, 0xb850), .driver_info = BTUSB_REALTEK },
 	{ USB_DEVICE(0x13d3, 0x3600), .driver_info = BTUSB_REALTEK },
 	{ USB_DEVICE(0x13d3, 0x3601), .driver_info = BTUSB_REALTEK },
+	{ USB_DEVICE(0x13d3, 0x3626), .driver_info = BTUSB_REALTEK },
 	{ USB_DEVICE(0x0489, 0xe112), .driver_info = BTUSB_REALTEK |
 						     BTUSB_WIDEBAND_SPEECH },
 

-- 
2.55.0