powerpc: Remove MSI-related PCI controller ops from ppc_md

Remove unneeded ppc_md functions. Patch callsites to use pci_controller_ops
functions exclusively.

Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/msi.c

@@ -17,9 +17,8 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
 	struct pci_controller *phb = pci_bus_to_host(dev->bus);
 
-	if ((!phb->controller_ops.setup_msi_irqs ||
-	     !phb->controller_ops.teardown_msi_irqs) &&
-	    (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs)) {
+	if (!phb->controller_ops.setup_msi_irqs ||
+	    !phb->controller_ops.teardown_msi_irqs) {
 		pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
 		return -ENOSYS;
 	}
@@ -28,18 +27,12 @@ int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 	if (type == PCI_CAP_ID_MSI && nvec > 1)
 		return 1;
 
-	if (phb->controller_ops.setup_msi_irqs)
-		return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
-	else
-		return ppc_md.setup_msi_irqs(dev, nvec, type);
+	return phb->controller_ops.setup_msi_irqs(dev, nvec, type);
 }
 
 void arch_teardown_msi_irqs(struct pci_dev *dev)
 {
 	struct pci_controller *phb = pci_bus_to_host(dev->bus);
 
-	if (phb->controller_ops.teardown_msi_irqs)
-		phb->controller_ops.teardown_msi_irqs(dev);
-	else
-		ppc_md.teardown_msi_irqs(dev);
+	phb->controller_ops.teardown_msi_irqs(dev);
 }