Input: synaptics - add LEN2072 to smbus_pnp_ids for ThinkPad P14s Gen 2i

The ThinkPad P14s Gen 2i (20VX) has a Synaptics TM3471-030 touchpad
(PNP ID LEN2072, firmware 3324237) that supports SMBus/RMI4, but it is
not in smbus_pnp_ids[], so psmouse drives it in legacy PS/2 mode. There
it is limited to two tracked contacts and shares the i8042 channel with
the TrackPoint.

With psmouse.synaptics_intertouch=1 the touchpad binds to rmi4 at SMBus
address 0x2c, reports four contacts, and the TrackPoint keeps working
through the RMI4 pass-through port. Suspend/resume (s2idle) works.

Add LEN2072 to the smbus_pnp_ids[] passlist.

Signed-off-by: Dmitry Mikushin <dmitry@kernelgen.org>
Link: https://patch.msgid.link/20261026142648.2567233-4-dmitry@kernelgen.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>