PCI/portdrv: Move pcie_port_bus_type to pcie source file

Conceptually the pci_express bus doesn't belong in generic PCI code.
Move pcie_port_bus_match() and pcie_port_bus_type to pcie/portdrv.c.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/420d771f0091dea7cf18f445b94301576dcee4c8.1764688034.git.u.kleine-koenig@baylibre.com

drivers/pci/pci-driver.c

@@ -1701,28 +1701,6 @@ const struct bus_type pci_bus_type = {
 };
 EXPORT_SYMBOL(pci_bus_type);
 
-#ifdef CONFIG_PCIEPORTBUS
-static int pcie_port_bus_match(struct device *dev, const struct device_driver *drv)
-{
-	struct pcie_device *pciedev = to_pcie_device(dev);
-	const struct pcie_port_service_driver *driver = to_service_driver(drv);
-
-	if (driver->service != pciedev->service)
-		return 0;
-
-	if (driver->port_type != PCIE_ANY_PORT &&
-	    driver->port_type != pci_pcie_type(pciedev->port))
-		return 0;
-
-	return 1;
-}
-
-const struct bus_type pcie_port_bus_type = {
-	.name		= "pci_express",
-	.match		= pcie_port_bus_match,
-};
-#endif
-
 static int __init pci_driver_init(void)
 {
 	int ret;

drivers/pci/pcie/portdrv.c

@@ -508,6 +508,21 @@ static void pcie_port_device_remove(struct pci_dev *dev)
 	pci_free_irq_vectors(dev);
 }
 
+static int pcie_port_bus_match(struct device *dev, const struct device_driver *drv)
+{
+	struct pcie_device *pciedev = to_pcie_device(dev);
+	const struct pcie_port_service_driver *driver = to_service_driver(drv);
+
+	if (driver->service != pciedev->service)
+		return 0;
+
+	if (driver->port_type != PCIE_ANY_PORT &&
+	    driver->port_type != pci_pcie_type(pciedev->port))
+		return 0;
+
+	return 1;
+}
+
 /**
  * pcie_port_probe_service - probe driver for given PCI Express port service
  * @dev: PCI Express port service device to probe against
@@ -564,6 +579,11 @@ static int pcie_port_remove_service(struct device *dev)
 	return 0;
 }
 
+const struct bus_type pcie_port_bus_type = {
+	.name = "pci_express",
+	.match = pcie_port_bus_match,
+};
+
 /**
  * pcie_port_service_register - register PCI Express port service driver
  * @new: PCI Express port service driver to register