Input: synaptics - add manual min/max quirk for ThinkPad X240

This extends Benjamin Tissoires manual min/max quirk table with support for
the ThinkPad X240.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>