Merge branch 'pci/switchtec'

- Return error to application when command execution fails because an
  out-of-band reset has cleared the device BARs, Memory Space Enable, etc
  (Kelvin Cao)

- Fix MRPC error status handling issue (Kelvin Cao)

- Mask out other bits when reading of management VEP instance ID (Kelvin
  Cao)

- Return EOPNOTSUPP instead of ENOTSUPP from sysfs show functions (Kelvin
  Cao)

- Add check of event support (Logan Gunthorpe)

* pci/switchtec:
  PCI/switchtec: Add check of event support
  PCI/switchtec: Replace ENOTSUPP with EOPNOTSUPP
  PCI/switchtec: Update the way of getting management VEP instance ID
  PCI/switchtec: Fix a MRPC error status handling issue
  PCI/switchtec: Error out MRPC execution when MMIO reads fail