synaptics_3k: rename sysfs entries and variables

I think the names inherited from endeavoru were
a tad bit confusing. Better now.
atmel: rename sysfs entries and variables

I think the names inherited from endeavoru were
a tad bit confusing. Better now.
synaptics_3k: remove separate debug variable and hide more debug prints
atmel: remove separate debug variable and hide more debug prints
synaptics_3k: turn s2w/dt2w off by default
synaptics_3k: remove syn_mutex

Maybe reintroduce it later with wider use.
atmel: turn s2w/dt2w off by default