Merge branch 'pci/controller/switchtec'

- Return -EFAULT instead of unrelated codes for copy_to_user() errors
  (Bjorn Helgaas)

* pci/controller/switchtec:
  PCI: switchtec: Return -EFAULT for copy_to_user() errors
  PCI: switchtec: Simplify switchtec_dma_mrpc_isr()