Add support for EXC81W32 controllers.

Tested with firmware reported as type "PCAP81X32 Series",
model "Orion_0183_1019", fw_version "8001280G".
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20240710-input-exc3000-exc81w32-v3-2-4272183628b4@pengutronix.deSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>