power: Add AMS AS3722 PMIC support

The AS3722 provides a number of DC/DC converters and LDOs as well as 8
GPIOs.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
5 files changed