MIPS: add dummy pci_load_of_ranges

The pci_load_of_ranges function is only available if
CONFIG_OF is selected. If the function is used without
CONFIG_OF being enabled it will cause a build error.

Add a dummy inline function to avoid this.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4911/
Signed-off-by: John Crispin <blogic@openwrt.org>
diff --git a/arch/mips/include/asm/pci.h b/arch/mips/include/asm/pci.h
index d69ea74..630645e 100644
--- a/arch/mips/include/asm/pci.h
+++ b/arch/mips/include/asm/pci.h
@@ -144,8 +144,13 @@
 
 extern char * (*pcibios_plat_setup)(char *str);
 
+#ifdef CONFIG_OF
 /* this function parses memory ranges from a device node */
 extern void pci_load_of_ranges(struct pci_controller *hose,
 			       struct device_node *node);
+#else
+static inline void pci_load_of_ranges(struct pci_controller *hose,
+				      struct device_node *node) {}
+#endif
 
 #endif /* _ASM_PCI_H */