[turbofan] add configuration parameters for register allocator

src/compiler/arm/linkage-arm.cc

Index: src/compiler/arm/linkage-arm.cc
diff --git a/src/compiler/arm/linkage-arm.cc b/src/compiler/arm/linkage-arm.cc
index 6673a475bd809b179bab25b8f131f2a8fe6e8fc6..9a65ccc10983f3c54d91597ef9ceff6137d84570 100644
--- a/src/compiler/arm/linkage-arm.cc
+++ b/src/compiler/arm/linkage-arm.cc
@@ -49,7 +49,7 @@ CallDescriptor* Linkage::GetRuntimeCallDescriptor(
 
 
 CallDescriptor* Linkage::GetStubCallDescriptor(
-    CallInterfaceDescriptor descriptor, int stack_parameter_count,
+    const CallInterfaceDescriptor& descriptor, int stack_parameter_count,
     CallDescriptor::Flags flags, Zone* zone) {
   return LH::GetStubCallDescriptor(zone, descriptor, stack_parameter_count,
                                    flags);