Merge branch 'pci/switchtec'

  - Support 64-bit addressing for both streaming and coherent DMA (Wesley
    Sheng)

  - Read vep_vector_number with 16-bit, not 32-bit read (Logan Gunthorpe)

  - Add Intercomm Notify and Upstream Error Containment support (Logan
    Gunthorpe)

  - Remove redundant valid PFF number count (Wesley Sheng)

  - Avoid unnecessary CSR read in ISR (Wesley Sheng)

  - Rename Gen3-specific constants (Logan Gunthorpe)

  - Rework infrastructure to support Gen3- and Gen4-specific code (Logan
    Gunthorpe)

  - Add Gen4 system info register support (Logan Gunthorpe)

  - Add Gen4 flash information interface support (Kelvin Cao)

  - Add Gen4 MRPC GAS access permission check (Kelvin Cao)

* pci/switchtec:
  PCI/switchtec: Add Gen4 device IDs
  PCI/switchtec: Add Gen4 MRPC GAS access permission check
  PCI/switchtec: Add Gen4 flash information interface support
  PCI/switchtec: Add Gen4 system info register support
  PCI/switchtec: Separate Gen3 register structures into unions
  PCI/switchtec: Factor out Gen3 ioctl_flash_part_info()
  PCI/switchtec: Add 'generation' variable
  PCI/switchtec: Rename generation-specific constants
  PCI/switchtec: Move check event ID from mask_event() to switchtec_event_isr()
  PCI/switchtec: Remove redundant valid PFF number count
  PCI/switchtec: Add support for Intercomm Notify and Upstream Error Containment
  PCI/switchtec: Fix vep_vector_number ioread width
  PCI/switchtec: Use dma_set_mask_and_coherent()