x86: unify smp_send_stop

function definition is moved to common header.
x86_64 version is now called native_smp_send_stop

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/smp.h b/include/asm-x86/smp.h
index 28cb1f8..2ab8ed4 100644
--- a/include/asm-x86/smp.h
+++ b/include/asm-x86/smp.h
@@ -25,6 +25,11 @@
 #ifdef CONFIG_SMP
 extern struct smp_ops smp_ops;
 
+static inline void smp_send_stop(void)
+{
+	smp_ops.smp_send_stop();
+}
+
 static inline void smp_prepare_boot_cpu(void)
 {
 	smp_ops.smp_prepare_boot_cpu();