Cleanup interface descriptors to reflect that vectors are part of stores.

src/arm64/interface-descriptors-arm64.cc

Index: src/arm64/interface-descriptors-arm64.cc
diff --git a/src/arm64/interface-descriptors-arm64.cc b/src/arm64/interface-descriptors-arm64.cc
index dc229cca9559e45a6194b9cefa835e40ad805acd..e08d7e2c54b061efa06ec8d96bd66d6fb67463df 100644
--- a/src/arm64/interface-descriptors-arm64.cc
+++ b/src/arm64/interface-descriptors-arm64.cc
@@ -33,13 +33,9 @@ const Register LoadWithVectorDescriptor::VectorRegister() { return x3; }
 const Register StoreDescriptor::ReceiverRegister() { return x1; }
 const Register StoreDescriptor::NameRegister() { return x2; }
 const Register StoreDescriptor::ValueRegister() { return x0; }
+const Register StoreDescriptor::SlotRegister() { return x4; }
 
-
-const Register VectorStoreICTrampolineDescriptor::SlotRegister() { return x4; }
-
-
-const Register VectorStoreICDescriptor::VectorRegister() { return x3; }
-
+const Register StoreWithVectorDescriptor::VectorRegister() { return x3; }
 
 const Register VectorStoreTransitionDescriptor::SlotRegister() { return x4; }
 const Register VectorStoreTransitionDescriptor::VectorRegister() { return x3; }