regulator: Updates for v3.17 A couple of nice new features this month, the ability to map regulators in order to allow voltage control by external coprocessors is something people have been asking for for a long time. - Improved support for switch only "regulators", allowing current state to be read from the parent regulator but no setting. - Support for obtaining the register access method used to set voltages, for use in systems which can offload control of this to a coprocessor (typically for DVFS). - Support for Active-Semi AC8846, Dialog DA9211 and Texas Instruments TPS65917.