PPC: [runtime] Optimize and unify rest parameters.

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 20641f5fb8326e206877d083a877ad11cad080dd..a3f8ef4f552e7f272317b7c53d06d593efd4b356 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -63,11 +63,6 @@ const Register ArgumentsAccessNewDescriptor::parameter_count() { return r5; }
 const Register ArgumentsAccessNewDescriptor::parameter_pointer() { return r6; }
 
 
-const Register RestParamAccessDescriptor::parameter_count() { return r5; }
-const Register RestParamAccessDescriptor::parameter_pointer() { return r6; }
-const Register RestParamAccessDescriptor::rest_parameter_index() { return r7; }
-
-
 const Register ApiGetterDescriptor::function_address() { return r5; }
 
 
@@ -96,6 +91,12 @@ void FastNewContextDescriptor::InitializePlatformSpecific(
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void FastNewRestParameterDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {r4};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 
 void ToNumberDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {