PCI/PME: Drop unused support for PMEs from Root Complex Event Collectors

Since we register pcie_pme_driver only for PCI_EXP_TYPE_ROOT_PORT, the PME
driver never claims Root Complex Event Collectors.

Remove unused code related to Root Complex Event Collectors.
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/pci/pcie/pme.c

@@ -319,23 +319,8 @@ static int pcie_pme_set_native(struct pci_dev *dev, void *ign)
 static void pcie_pme_mark_devices(struct pci_dev *port)
 {
 	pcie_pme_set_native(port, NULL);
-	if (port->subordinate) {
+	if (port->subordinate)
 		pci_walk_bus(port->subordinate, pcie_pme_set_native, NULL);
-	} else {
-		struct pci_bus *bus = port->bus;
-		struct pci_dev *dev;
-
-		/* Check if this is a root port event collector. */
-		if (pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC || !bus)
-			return;
-
-		down_read(&pci_bus_sem);
-		list_for_each_entry(dev, &bus->devices, bus_list)
-			if (pci_is_pcie(dev)
-			    && pci_pcie_type(dev) == PCI_EXP_TYPE_RC_END)
-				pcie_pme_set_native(dev, NULL);
-		up_read(&pci_bus_sem);
-	}
 }
 
 /**