Merge branch 'remotes/lorenzo/pci/power-slot'

- Add of_pci_get_slot_power_limit() to parse the
  'slot-power-limit-milliwatt' DT property (Pali Rohár)

- Add mvebu support for sending Set_Slot_Power_Limit message (Pali Rohár)

* remotes/lorenzo/pci/power-slot:
  PCI: mvebu: Add support for sending Set_Slot_Power_Limit message
  PCI: Add function for parsing 'slot-power-limit-milliwatt' DT property
  PCI: Add PCI_EXP_SLTCTL_ASPL_DISABLE macro