Recognise the soft button area property before clickpad is enabled
Recognise the soft button area property before clickpad is enabled

Otherwise the driver has no internal reference to the soft button area
property and will ignore any setting.

Also, if a client sets this property, we claim it as our own and disallow
deletion.

Signed-off-by: Peter Hutterer <b9c50af7afa7642f6f854434cda9ffe54ece8b85@who-t.net>

mad-s/xf86-input-synaptics-absolute,mad-s/xf86-input-synaptics-absolute