move pci_domain_nr() inside "#ifdef CONFIG_PCI" bracket

[David Mosberger]

Trivial build fix: pci_domain_nr() cannot be declared unless
CONFIG_PCI is defined (otherwise, struct pci_bus hasn't been defined).

	--david

diff -Nru a/include/linux/pci.h b/include/linux/pci.h
--- a/include/linux/pci.h	Wed Jun 18 13:32:49 2003
+++ b/include/linux/pci.h	Wed Jun 18 13:32:49 2003
@@ -743,6 +743,15 @@
 	return rc;
 }
 
+/*
+ * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
+ * a PCI domain is defined to be a set of PCI busses which share
+ * configuration space.
+ */
+#ifndef CONFIG_PCI_DOMAINS
+static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
+#endif
+
 #endif /* !CONFIG_PCI */
 
 /* these helpers provide future and backwards compatibility
@@ -799,16 +808,6 @@
 #define PCIPCI_VIAETBF		8
 #define PCIPCI_VSFX		16
 #define PCIPCI_ALIMAGIK		32
-
-/*
- * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
- * a PCI domain is defined to be a set of PCI busses which share
- * configuration space.
- */
-
-#ifndef CONFIG_PCI_DOMAINS
-static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
-#endif
 
 #endif /* __KERNEL__ */
 #endif /* LINUX_PCI_H */