PCI: Add wrappers for dev_printk()

Add PCI-specific dev_printk() wrappers and use them to simplify the code
slightly.  No functional change intended.

Signed-off-by: Frederick Lawler <fred@fredlawl.com>
[bhelgaas: squash into one patch]
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/pci/pcie/ptm.c

@@ -33,7 +33,7 @@ static void pci_ptm_info(struct pci_dev *dev)
 			 dev->ptm_granularity);
 		break;
 	}
-	dev_info(&dev->dev, "PTM enabled%s, %s granularity\n",
+	pci_info(dev, "PTM enabled%s, %s granularity\n",
 		 dev->ptm_root ? " (root)" : "", clock_desc);
 }