i386: Expose IOAPIC register definitions even if CONFIG_X86_IO_APIC is not set

KVM reuses the IOAPIC register definitions, and needs them even if the
host is not compiled with IOAPIC support.  Move the #ifdef below so that only
the IOAPIC variables and functions are protected, and the register definitions
are available to all.
Signed-off-by: Avi Kivity <avi@qumranet.com>

include/asm-x86/io_apic_32.h

@@ -11,8 +11,6 @@
  * Copyright (C) 1997, 1998, 1999, 2000 Ingo Molnar
  */
 
-#ifdef CONFIG_X86_IO_APIC
-
 /*
  * The structure of the IO-APIC:
  */
@@ -55,12 +53,6 @@ union IO_APIC_reg_03 {
 	} __attribute__ ((packed)) bits;
 };
 
-/*
- * # of IO-APICs and # of IRQ routing registers
- */
-extern int nr_ioapics;
-extern int nr_ioapic_registers[MAX_IO_APICS];
-
 enum ioapic_irq_destination_types {
 	dest_Fixed = 0,
 	dest_LowestPrio = 1,
@@ -100,6 +92,14 @@ struct IO_APIC_route_entry {
 
 } __attribute__ ((packed));
 
+#ifdef CONFIG_X86_IO_APIC
+
+/*
+ * # of IO-APICs and # of IRQ routing registers
+ */
+extern int nr_ioapics;
+extern int nr_ioapic_registers[MAX_IO_APICS];
+
 /*
  * MP-BIOS irq configuration table structures:
  */