udev: fix ALPS firmware detection
The firmware version is in id.version, not id.model which is always
PSMOUSE_ALPS for ALPS devices.
The various fw versions are listed in <kernel>/drivers/input/mouse/alps.h and
are all hex numbers. Version 8 is actually 0x800, change the match
accordingly.
Expected side-effect: earlier versions of ALPS touchpads now lose their
(erroneous) size assignment.
Signed-off-by:
Peter Hutterer <peter.hutterer@who-t.net>