powerpc/pci: remove the dma_set_mask pci_controller ops methods

Unused now.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/pci-bridge.h

@@ -45,8 +45,6 @@ struct pci_controller_ops {
 	void		(*teardown_msi_irqs)(struct pci_dev *pdev);
 #endif
 
-	int             (*dma_set_mask)(struct pci_dev *pdev, u64 dma_mask);
-
 	void		(*shutdown)(struct pci_controller *hose);
 };
 

arch/powerpc/kernel/dma.c

@@ -304,13 +304,6 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
 	if (ppc_md.dma_set_mask)
 		return ppc_md.dma_set_mask(dev, dma_mask);
 
-	if (dev_is_pci(dev)) {
-		struct pci_dev *pdev = to_pci_dev(dev);
-		struct pci_controller *phb = pci_bus_to_host(pdev->bus);
-		if (phb->controller_ops.dma_set_mask)
-			return phb->controller_ops.dma_set_mask(pdev, dma_mask);
-	}
-
 	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
 		return -EIO;
 	*dev->dma_mask = dma_mask;