Input: psmouse - properly reset mouse on shutdown/suspend

Some people report that they need psmouse module unloaded
for suspend to ram/disk to work properly. Let's make port
cleanup behave the same way as driver unload.

This fixes "bad state" roblem on various HP laptops, such
as nx7400.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>