Rebased the patch and added math library to satify tree.c's log() requirement.
(From OE-Core rev: f235a69f8d5cee6f6d8e7feccd83e8e619e2ddcf)
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>