commit 8f1d3b68ff08466f55c55e03f9aa4d989c515095 (powerpc/powernv : Drop reference added by kset_find_obj()) was released in UBUNTU: Ubuntu-4.4.0-39.59 which never made it out of proposed. It has since been superseded by Ubuntu-4.4.0-41.61 due to regressions respins. That is the version that you should be verifying.
commit 8f1d3b68ff08466 f55c55e03f9aa4d 989c515095 (powerpc/powernv : Drop reference added by kset_find_obj()) was released in UBUNTU: Ubuntu-4.4.0-39.59 which never made it out of proposed. It has since been superseded by Ubuntu-4.4.0-41.61 due to regressions respins. That is the version that you should be verifying.