PCI: tango: Add MSI controller support

Add support for the MSI controller in Tango, which supports 256
message-signaled interrupts and a single doorbell address.

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
1 file changed