Use bit percentage for fan speed
Summary: Fan speed has a range of 0-255, Send the speed by bit percent
Reviewers: patrickelectric, tcanabrava, laysrodrigues, leandrosantiago
Reviewed By: patrickelectric, laysrodrigues
Subscribers: Atelier: AtCore
Tags: Atelier: AtCore
Differential Revision: https://phabricator.kde.org/D15700