x86: fix wakeup_cpu with numaq/es7000, v2, fix #2

Impact: fix boot crash

fix default_update_genapic().
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/kernel/setup.c

@@ -585,8 +585,10 @@ early_param("elfcorehdr", setup_elfcorehdr);
 
 static int __init default_update_genapic(void)
 {
-#if defined(CONFIG_X86_GENERICARCH) || defined(CONFIG_X86_64)
-	genapic->wakeup_cpu = wakeup_secondary_cpu_via_nmi;
+#ifdef CONFIG_X86_SMP
+# if defined(CONFIG_X86_GENERICARCH) || defined(CONFIG_X86_64)
+	genapic->wakeup_cpu = wakeup_secondary_cpu_via_init;
+# endif
 #endif
 
 	return 0;