MFC r272729,272732:   Add new quirk PCI_QUIRK_MSI_INTX_BUG to pci(4).   QAC AR816x/E2200 controller has a silicon bug that MSI interrupt   does not assert if PCIM_CMD_INTxDIS bit of command register is set.
MFC r272729,272732:
  Add new quirk PCI_QUIRK_MSI_INTX_BUG to pci(4).
  QAC AR816x/E2200 controller has a silicon bug that MSI interrupt
  does not assert if PCIM_CMD_INTxDIS bit of command register is set.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase