x86: make generic arch support NUMAQ, fix

fix typo in bigsmp switching.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mach-generic/probe.c b/arch/x86/mach-generic/probe.c
index ba18dec..5a7e461 100644
--- a/arch/x86/mach-generic/probe.c
+++ b/arch/x86/mach-generic/probe.c
@@ -64,7 +64,7 @@
 
 void __init generic_bigsmp_probe(void)
 {
-#if CONFIG_X86_BIGSMP
+#ifdef CONFIG_X86_BIGSMP
 	/*
 	 * This routine is used to switch to bigsmp mode when
 	 * - There is no apic= option specified by the user