PPC/s390: [cleanup] combine 3 ResumeGenerator stubs into one

src/ppc/interface-descriptors-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 373 matching lines @@
       r4   // the runtime function to call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 void ResumeGeneratorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
       r3,  // the value to pass to the generator
       r4,  // the JSGeneratorObject to resume
-      r5   // the resume mode (tagged)
+      r5,  // the resume mode (tagged)
+      r6   // SuspendFlags (tagged)
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 void FrameDropperTrampolineDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
       r4,  // loaded new FP
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC