intf scroller: Added wheel_disable_set/get API descriptions.
intf scroller: Added wheel_disable_set/get API descriptions.

Reviewers: herdsman, raster, Hermet

Reviewed By: Hermet

Subscribers: seoz

Differential Revision: https://phab.enlightenment.org/D2384

tasn/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,rvandegrift/elementary,rvandegrift/elementary,FlorentRevest/Elementary