PPC: Cleanup interface descriptors to reflect that vectors are part of loads.

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 6676909eae1725f30fd7a5fcb8fed15567d75576..57def67a5f7d67fe48515882a0b83d9a1b8374eb 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -3049,8 +3049,8 @@ void LCodeGen::DoReturn(LReturn* instr) {
 template <class T>
 void LCodeGen::EmitVectorLoadICRegisters(T* instr) {
   Register vector_register = ToRegister(instr->temp_vector());
-  Register slot_register = VectorLoadICDescriptor::SlotRegister();
-  DCHECK(vector_register.is(VectorLoadICDescriptor::VectorRegister()));
+  Register slot_register = LoadDescriptor::SlotRegister();
+  DCHECK(vector_register.is(LoadWithVectorDescriptor::VectorRegister()));
   DCHECK(slot_register.is(r3));
 
   AllowDeferredHandleDereference vector_structure_check;