USB: serial: ftdi_sio: add support for u-blox EVK-M101

USB: serial: ftdi_sio: add support for u-blox EVK-M101

The U-Blox EVK-M101 enumerates as 1546:0506 [1] with four FTDI interfaces:
- EVK-M101 current sensors
- EVK-M101 I2C
- EVK-M101 UART
- EVK-M101 port D

Only the third USB interface is a UART. This change lets ftdi_sio probe
the VID/PID and registers only interface #3 as a TTY, leaving the rest
available for other drivers.

[1]
usb 5-1.3: new high-speed USB device number 11 using xhci_hcd
usb 5-1.3: New USB device found, idVendor=1546, idProduct=0506, bcdDevice= 8.00
usb 5-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 5-1.3: Product: EVK-M101
usb 5-1.3: Manufacturer: u-blox AG

Datasheet: https://content.u-blox.com/sites/default/files/documents/EVK-M10_UserGuide_UBX-21003949.pdf

Signed-off-by: Oleksandr Suvorov <cryosay@gmail.com>
Link: https://lore.kernel.org/20250926060235.3442748-1-cryosay@gmail.com/
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>