pci/of: Consolidate pci_bus_to_OF_node()

The generic code always get the device-node in the right place now
so a single implementation will work for all archs

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>

arch/microblaze/include/asm/pci-bridge.h

@@ -102,11 +102,6 @@ struct pci_controller {
 };
 
 #ifdef CONFIG_PCI
-static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
-{
-	return bus->dev.of_node;
-}
-
 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 {
 	return bus->sysdata;

arch/powerpc/include/asm/pci-bridge.h

@@ -169,11 +169,6 @@ static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
 	return bus->sysdata;
 }
 
-static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
-{
-	return bus->dev.of_node;
-}
-
 #ifndef CONFIG_PPC64
 
 extern int pci_device_from_OF_node(struct device_node *node,

arch/x86/include/asm/prom.h

@@ -30,12 +30,6 @@ extern void add_dtb(u64 data);
 extern void x86_add_irq_domains(void);
 void __cpuinit x86_of_pci_init(void);
 void x86_dtb_init(void);
-
-static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
-{
-	return pci_device_to_OF_node(bus->self);
-}
-
 #else
 static inline void add_dtb(u64 data) { }
 static inline void x86_add_irq_domains(void) { }

include/linux/pci.h

@@ -1605,6 +1605,11 @@ static inline struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
 	return pdev ? pdev->dev.of_node : NULL;
 }
 
+static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
+{
+	return bus ? bus->dev.of_node : NULL;
+}
+
 #else /* CONFIG_OF */
 static inline void pci_set_of_node(struct pci_dev *dev) { }
 static inline void pci_release_of_node(struct pci_dev *dev) { }