Merge branch 'pci/controller/xgene'

- Teach handle_simple_irq() to resend an in-progress interrupt (Marc
  Zyngier)

- Defer probing if the MSI widget driver hasn't probed yet (Marc Zyngier)

- Drop useless conditional compilation, since pci-xgene.c is only compiled
  when CONFIG_PCI_XGENE is selected (Marc Zyngier)

- Drop useless XGENE_PCIE_IP_VER_UNKN IP version (Marc Zyngier)

- Simplify and make per-CPU interrupt setup robust (Marc Zyngier)

- Drop superfluous struct xgene_msi fields (Marc Zyngier)

- Use device-managed memory allocations (Marc Zyngier)

- Drop intermediate xgene_msi_group tracking structure (Marc Zyngier)

- Rewrite pci-xgene-msi.c to fix MSI CPU affinity and clean things up (Marc
  Zyngier)

- Resend an MSI racing with itself on a different CPU (Marc Zyngier)

- Probe xgene-msi as a standard platform driver rather than a
  subsys_initcall (Marc Zyngier)

- Simplify MSI handler setup/teardown by dropping useless CPU hotplug bits
  (Marc Zyngier)

- Remove unused cpuhp_state CPUHP_PCI_XGENE_DEAD (Marc Zyngier)

* pci/controller/xgene:
  cpu/hotplug: Remove unused cpuhp_state CPUHP_PCI_XGENE_DEAD
  PCI: xgene-msi: Restructure handler setup/teardown
  PCI: xgene-msi: Probe as a standard platform driver
  PCI: xgene-msi: Resend an MSI racing with itself on a different CPU
  PCI: xgene-msi: Sanitise MSI allocation and affinity setting
  PCI: xgene-msi: Get rid of intermediate tracking structure
  PCI: xgene-msi: Use device-managed memory allocations
  PCI: xgene-msi: Drop superfluous fields from xgene_msi structure
  PCI: xgene-msi: Make per-CPU interrupt setup robust
  PCI: xgene: Drop XGENE_PCIE_IP_VER_UNKN
  PCI: xgene: Drop useless conditional compilation
  PCI: xgene: Defer probing if the MSI widget driver hasn't probed yet
  genirq: Teach handle_simple_irq() to resend an in-progress interrupt

Author: bjorn-helgaas