x86, apic: fix build fallout of genapic changes

- make oprofile build
- select X86_X2APIC from X86_UV - it relies on it
- export genapic for oprofile modular build

Signed-off-by: Ingo Molnar <[e-mail]>

arch/x86/Kconfig

···
 	bool "SGI Ultraviolet"
 	depends on X86_64
 	depends on X86_EXTENDED_PLATFORM
+	select X86_X2APIC
 	---help---
 	  This option is needed in order to support SGI Ultraviolet systems.
 	  If you don't have one of these, you should say N here.

arch/x86/kernel/cpu/mcheck/p4.c

···
 #include <asm/processor.h>
 #include <asm/system.h>
 #include <asm/msr.h>
-#include <asm/apic.h>
+#include <asm/genapic.h>
 
 #include <asm/therm_throt.h>
 

arch/x86/kernel/genapic_64.c

···
 extern struct genapic apic_x2apic_cluster;
 
 struct genapic __read_mostly *apic = &apic_flat;
+EXPORT_SYMBOL_GPL(apic);
 
 static struct genapic *apic_probe[] __initdata = {
 #ifdef CONFIG_X86_UV

arch/x86/kernel/probe_32.c

···
  */
 #include <linux/threads.h>
 #include <linux/cpumask.h>
+#include <linux/module.h>
 #include <linux/string.h>
 #include <linux/kernel.h>
 #include <linux/ctype.h>
···
 extern struct genapic apic_default;
 
 struct genapic *apic = &apic_default;
+EXPORT_SYMBOL_GPL(apic);
 
 static struct genapic *apic_probe[] __initdata = {
 #ifdef CONFIG_X86_NUMAQ

arch/x86/oprofile/nmi_int.c

···
 #include <linux/cpu.h>
 #include <asm/nmi.h>
 #include <asm/msr.h>
-#include <asm/apic.h>
+#include <asm/genapic.h>
 
 #include "op_counter.h"
 #include "op_x86_model.h"

arch/x86/oprofile/op_model_p4.c

···
 #include <linux/nmi.h>
 #include <asm/msr.h>
 #include <asm/fixmap.h>
-#include <asm/apic.h>
+#include <asm/genapic.h>
 
 
 #include "op_x86_model.h"

arch/x86/oprofile/op_model_ppro.c

···
 #include <linux/slab.h>
 #include <asm/ptrace.h>
 #include <asm/msr.h>
-#include <asm/apic.h>
+#include <asm/genapic.h>
 #include <asm/nmi.h>
 #include <asm/intel_arch_perfmon.h>