Merge branch 'pci/dwc'

  - Use generic config space reader in qcom (Marc Gonzalez)

  - Stop calling IRQ handler cleanup in dwc driver for invalid MSI IRQs
    (Jisheng Zhang)

  - Free dwc MSI target page when freeing MSI (Jisheng Zhang)

  - Fix dwc MSI leak in host init error path (Jisheng Zhang)

  - Use managed host bridge alloc to simplify dwc (Jisheng Zhang)

  - Save dwc root pci_bus pointer for use by .remove() methods (Jisheng
    Zhang)

  - Allow imx6 asynchronous probing (Lucas Stach)

* pci/dwc:
  PCI: imx6: Allow asynchronous probing
  PCI: dwc: Save root bus for driver remove hooks
  PCI: dwc: Use devm_pci_alloc_host_bridge() to simplify code
  PCI: dwc: Free MSI in dw_pcie_host_init() error path
  PCI: dwc: Free MSI IRQ page in dw_pcie_free_msi()
  PCI: dwc: Fix dw_pcie_free_msi() if msi_irq is invalid
  PCI: qcom: Use default config space read function