The .active_power() callback passes the device pointer when it's called.
Aligned with a convetion present in other subsystems and pass the 'dev'
as a first argument. It looks more cleaner.

Adjust all affected drivers which implement that API callback.
Suggested-by: NIonela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: NLukasz Luba <lukasz.luba@arm.com>
Reviewed-by: NIonela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>