Some of these values may or may not be overridden on a per-package
basis, so handle them accordingly.
(Bitbake rev: 56cee6a958843b03c5389d4a45245a04d1e03327)
Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>