PPC: [runtime] Replace many buggy uses of %_CallFunction with %_Call.

src/ppc/interface-descriptors-ppc.cc

Index: src/ppc/interface-descriptors-ppc.cc
diff --git a/src/ppc/interface-descriptors-ppc.cc b/src/ppc/interface-descriptors-ppc.cc
index 70dcb0fffa2529818f2c92866970610bd5026c47..5fda82fa7458177b054128bd990e50be705e52d3 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -190,6 +190,15 @@ void CallConstructDescriptor::InitializePlatformSpecific(
 }
 
 
+void CallTrampolineDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  // r3 : number of arguments
+  // r4 : the target to call
+  Register registers[] = {r4, r3};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
+
 void RegExpConstructResultDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {r5, r4, r3};