Merge branch 'pci/msi' into next

* pci/msi:
  s390/MSI: Use __msi_mask_irq() instead of default_msi_mask_irq()
  Revert "PCI: Add x86_msi.msi_mask_irq() and msix_mask_irq()"
  PCI/MSI: Add pci_msi_ignore_mask to prevent writes to MSI/MSI-X Mask Bits