[turbofan] Simplifying handling of callee-cleanup stack area.

src/compiler/ppc/code-generator-ppc.cc

Index: src/compiler/ppc/code-generator-ppc.cc
diff --git a/src/compiler/ppc/code-generator-ppc.cc b/src/compiler/ppc/code-generator-ppc.cc
index cdc1424cc5e72a7f63a8efa2db56911971f95311..3d91e68a83d790198d8bb5817e23e8826060002b 100644
--- a/src/compiler/ppc/code-generator-ppc.cc
+++ b/src/compiler/ppc/code-generator-ppc.cc
@@ -1377,11 +1377,7 @@ void CodeGenerator::AssembleReturn() {
       __ b(&return_label_);
     } else {
       __ bind(&return_label_);
-      int pop_count = descriptor->IsJSFunctionCall()
-                          ? static_cast<int>(descriptor->JSParameterCount())
-                          : (info()->IsStub()
-                                 ? info()->code_stub()->GetStackParameterCount()
-                                 : 0);
+      int pop_count = static_cast<int>(descriptor->StackParameterCount());
       __ LeaveFrame(StackFrame::MANUAL, pop_count * kPointerSize);
       __ Ret();
     }