de4x5/PCI: use list_for_each_entry() for bus->devices traversal

Replace open-coded list traversal with list_for_each_entry().

CC: Grant Grundler <grundler@parisc-linux.org>
CC: netdev@vger.kernel.org
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/dec/tulip/de4x5.c

@@ -2127,14 +2127,9 @@ srom_search(struct net_device *dev, struct pci_dev *pdev)
     u_long iobase = 0;                     /* Clear upper 32 bits in Alphas */
     int i, j;
     struct de4x5_private *lp = netdev_priv(dev);
-    struct list_head *walk;
-
-    list_for_each(walk, &pdev->bus_list) {
-	struct pci_dev *this_dev = pci_dev_b(walk);
-
-	/* Skip the pci_bus list entry */
-	if (list_entry(walk, struct pci_bus, devices) == pdev->bus) continue;
+    struct pci_dev *this_dev;
 
+    list_for_each_entry(this_dev, &pdev->bus->devices, bus_list) {
 	vendor = this_dev->vendor;
 	device = this_dev->device << 8;
 	if (!(is_DC21040 || is_DC21041 || is_DC21140 || is_DC2114x)) continue;