commit 43e19888 upstream.

Check PNP ID of the PS/2 AUX port and report INPUT_PROP_TOPBUTTONPAD
property for for touchpads with top button areas.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Timo Aaltonen <timo.aaltonen@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>