ARM: PCI: remove per-pci_hw list of buses

No one uses the per-hw list of buses, so get rid of this.  Instead,
build the list locally.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/mach/pci.h

@@ -19,7 +19,6 @@ struct hw_pci {
 #ifdef CONFIG_PCI_DOMAINS
 	int		domain;
 #endif
-	struct list_head buses;
 	struct pci_ops	*ops;
 	int		nr_controllers;
 	int		(*setup)(int nr, struct pci_sys_data *);

arch/arm/kernel/bios32.c

@@ -423,7 +423,7 @@ static int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
 	return irq;
 }
 
-static void __init pcibios_init_hw(struct hw_pci *hw)
+static void __init pcibios_init_hw(struct hw_pci *hw, struct list_head *head)
 {
 	struct pci_sys_data *sys = NULL;
 	int ret;
@@ -463,7 +463,7 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
 
 			busnr = sys->bus->subordinate + 1;
 
-			list_add(&sys->node, &hw->buses);
+			list_add(&sys->node, head);
 		} else {
 			kfree(sys);
 			if (ret < 0)
@@ -475,19 +475,18 @@ static void __init pcibios_init_hw(struct hw_pci *hw)
 void __init pci_common_init(struct hw_pci *hw)
 {
 	struct pci_sys_data *sys;
-
-	INIT_LIST_HEAD(&hw->buses);
+	LIST_HEAD(head);
 
 	pci_add_flags(PCI_REASSIGN_ALL_RSRC);
 	if (hw->preinit)
 		hw->preinit();
-	pcibios_init_hw(hw);
+	pcibios_init_hw(hw, &head);
 	if (hw->postinit)
 		hw->postinit();
 
 	pci_fixup_irqs(pcibios_swizzle, pcibios_map_irq);
 
-	list_for_each_entry(sys, &hw->buses, node) {
+	list_for_each_entry(sys, &head, node) {
 		struct pci_bus *bus = sys->bus;
 
 		if (!pci_has_flag(PCI_PROBE_ONLY)) {