Merge tag 'powerpc-5.15-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Three commits fixing some issues introduced with the recent IOMMU
  changes we merged.

  Thanks to Alexey Kardashevskiy"

* tag 'powerpc-5.15-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pseries/iommu: Create huge DMA window if no MMIO32 is present
  powerpc/pseries/iommu: Check if the default window in use before removing it
  powerpc/pseries/iommu: Use correct vfree for it_map