[ic] Extract load IC proto array handlers handling to a separate stub.

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 c53a43cccea0cfa041fbe5f0f2b3b7ab19deacc6..74ad56405f962c9ced3cc844351378dff4f35022 100644
--- a/src/ppc/interface-descriptors-ppc.cc
+++ b/src/ppc/interface-descriptors-ppc.cc
@@ -29,9 +29,9 @@ const Register LoadDescriptor::ReceiverRegister() { return r4; }
 const Register LoadDescriptor::NameRegister() { return r5; }
 const Register LoadDescriptor::SlotRegister() { return r3; }
 
-
 const Register LoadWithVectorDescriptor::VectorRegister() { return r6; }
 
+const Register LoadICProtoArrayDescriptor::HandlerRegister() { return r7; }
 
 const Register StoreDescriptor::ReceiverRegister() { return r4; }
 const Register StoreDescriptor::NameRegister() { return r5; }