Input: xpad - sort xpad_device by vendor and product ID

This helps making sure there are no duplicate entries in the tables.

Signed-off-by: Brenton Simpson <appsforartists@google.com>
Link: https://lore.kernel.org/r/20240130231903.293265-1-appsforartists@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>