Merge branch 'pci/switchtec'

Merge branch 'pci/switchtec'

  - Remove status check after submitting Switchtec MRPC Firmware Download
    commands to avoid Completion Timeouts (Kelvin Cao)

  - Set Switchtec coherent DMA mask to allow 64-bit DMA (Boris Glimcher)

  - Fix Switchtec SWITCHTEC_IOCTL_EVENT_IDX_ALL flag overwrite issue (Joey
    Zhang)

  - Enable write combining for Switchtec MRPC Input buffers (Kelvin Cao)

  - Add Switchtec MRPC DMA mode support (Wesley Sheng)

* pci/switchtec:
  switchtec: Add MRPC DMA mode support
  switchtec: Improve MRPC efficiency by enabling write combining
  switchtec: Fix SWITCHTEC_IOCTL_EVENT_IDX_ALL flags overwrite
  switchtec: Set DMA coherent mask
  switchtec: Remove immediate status check after submitting MRPC command