Input: synaptics - add min/max quirk for Lenovo S540

https://bugzilla.redhat.com/show_bug.cgi?id=1223051#c2



Cc: stable@vger.kernel.org
Tested-by:  <tommy.gagnes@gmail.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>