PCI: make isa_bridge Alpha-only

Since isa_bridge is neither assigned any value !NULL nor used on !Alpha, 
there's no reason for providing it.
Signed-off-by: NAdrian Bunk <bunk@stusta.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

arch/alpha/kernel/pci.c

@@ -575,3 +575,7 @@ void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
 
 EXPORT_SYMBOL(pci_iomap);
 EXPORT_SYMBOL(pci_iounmap);
+
+/* FIXME: Some boxes have multiple ISA bridges! */
+struct pci_dev *isa_bridge;
+EXPORT_SYMBOL(isa_bridge);

drivers/pci/pci.c

@@ -1224,12 +1224,6 @@ early_param("pci", pci_setup);
 
 device_initcall(pci_init);
 
-#if defined(CONFIG_ISA) || defined(CONFIG_EISA)
-/* FIXME: Some boxes have multiple ISA bridges! */
-struct pci_dev *isa_bridge;
-EXPORT_SYMBOL(isa_bridge);
-#endif
-
 EXPORT_SYMBOL_GPL(pci_restore_bars);
 EXPORT_SYMBOL(pci_enable_device_bars);
 EXPORT_SYMBOL(pci_enable_device);

include/asm-alpha/pci.h

@@ -293,4 +293,6 @@ struct pci_dev *alpha_gendev_to_pci(struct device *dev);
 #define IOBASE_ROOT_BUS		5
 #define IOBASE_FROM_HOSE	0x10000
 
+extern struct pci_dev *isa_bridge;
+
 #endif /* __ALPHA_PCI_H */

include/linux/pci.h

@@ -618,10 +618,6 @@ enum pci_dma_burst_strategy {
 				   strategy_parameter byte boundaries */
 };
 
-#if defined(CONFIG_ISA) || defined(CONFIG_EISA)
-extern struct pci_dev *isa_bridge;
-#endif
-
 struct msix_entry {
 	u16 	vector;	/* kernel uses to write allocated vector */
 	u16	entry;	/* driver uses to specify entry, OS writes */
@@ -729,8 +725,6 @@ static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state) {
 static inline pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state) { return PCI_D0; }
 static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state, int enable) { return 0; }
 
-#define	isa_bridge	((struct pci_dev *)NULL)
-
 #define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
 
 static inline void pci_block_user_cfg_access(struct pci_dev *dev) { }