Merge branch 'pci/dt-bindings'

Merge branch 'pci/dt-bindings'

- Add qcom,pcie-ipq5332 binding (Varadarajan Narayanan)

- Convert fsl,mpc83xx-pcie binding to YAML (J. Neuschäfer)

- Add qcom i.MX8QM and i.MX8QXP/DXP optional DMA interrupt (Alexander
  Stein)

- Drop deprecated layerscape 'num-ib-windows' and 'num-ob-windows' from
  example (Krzysztof Kozlowski)

- Drop unnecessary layerscape 'status' from example (Krzysztof Kozlowski)

- Add common pci-ep-bus.yaml schema for exporting several peripherals of a
  single PCI function via devicetree (Andrea della Porta)

* pci/dt-bindings:
  dt-bindings: PCI: Add common schema for devices accessible through PCI BARs
  dt-bindings: PCI: fsl,layerscape-pcie-ep: Drop unnecessary status from example
  dt-bindings: PCI: fsl,layerscape-pcie-ep: Drop deprecated windows
  dt-bindings: PCI: fsl,imx6q-pcie: Add optional DMA interrupt
  dt-bindings: PCI: Convert fsl,mpc83xx-pcie to YAML
  dt-bindings: PCI: qcom: Document the IPQ5332 PCIe controller