generic-ipi: more merge fallout

fix more API change fallout in recently merged upstream changes.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/ppc/kernel/smp.c b/arch/ppc/kernel/smp.c
index 0559985..bcab0d2 100644
--- a/arch/ppc/kernel/smp.c
+++ b/arch/ppc/kernel/smp.c
@@ -152,7 +152,7 @@
 
 void smp_send_stop(void)
 {
-	smp_call_function(stop_this_cpu, NULL, 1, 0);
+	smp_call_function(stop_this_cpu, NULL, 0);
 }
 
 /*