Documented the Power Management subsystem which includes the
power management hook interface, device power management,
device busy status interfac and other APIs. Also included
is a guide to writing Power Management applications.
This has 2 parts. One is the general description of the
infrastructure and the PMA writing guide which goes in the
'subsystem' area. Other is the API description that gets
automatically pulled in from the comments in the source files.
The API description goes into the section where all other
Zephyr APIs are put.
Change-Id: Id630209b23f931a8fcccb6f59428610298486743
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
Ramesh Thomas