regulator: pm8xxx-regulator: Add control for boost regulators

Add the functions required to control boost regulators on PMIC
PM8XXX chips.  These regulators would typically be used to output
5.0 V for USB OTG but may be programmed for voltages between
4.0 V and 5.55 V.

Change-Id: I016b9ffa41853c18fda919048eb06002d9ca0c64
Signed-off-by: David Collins <collinsd@codeaurora.org>
2 files changed