We want this API to be easier to use, so add missing function
documentation to help with that.
(Bitbake rev: 3e0e002d6497caa987f327cd83ad4db82cca6810)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>