Pull powerpc fixes from Michael Ellerman:
- Fix for dynticks.
- Fix for smpboot bug.
- Fix for IOMMU group refcounting.
* tag 'powerpc-4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux:
powerpc/iommu: Remove IOMMU device references via bus notifier
powerpc/smp: Wait until secondaries are active & online
powerpc: Re-enable dynticks