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

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 1c751ee9504c3810e8e458347cc1e376a9a2ca01..de48e7c73a46a207c0b843e1bbe669c2f446dad4 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -16,12 +16,10 @@ const Register CallInterfaceDescriptor::ContextRegister() { return cp; }
 
 const Register LoadDescriptor::ReceiverRegister() { return r4; }
 const Register LoadDescriptor::NameRegister() { return r5; }
+const Register LoadDescriptor::SlotRegister() { return r3; }
 
 
-const Register VectorLoadICTrampolineDescriptor::SlotRegister() { return r3; }
-
-
-const Register VectorLoadICDescriptor::VectorRegister() { return r6; }
+const Register LoadWithVectorDescriptor::VectorRegister() { return r6; }
 
 
 const Register StoreDescriptor::ReceiverRegister() { return r4; }