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 <mingo@elte.hu>
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index 202864a..a32a5c7 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -19,7 +19,7 @@
 #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"