Move MachineRepresentation to machine-type.h and rename to MachineType in preparation for merging i…

src/compiler/arm64/linkage-arm64.cc

Index: src/compiler/arm64/linkage-arm64.cc
diff --git a/src/compiler/arm64/linkage-arm64.cc b/src/compiler/arm64/linkage-arm64.cc
index e44c5d86fda34fbaf6c9aa2b1490403519106d5e..186f2d59da31dc923846a938d2f61fa234e78ba5 100644
--- a/src/compiler/arm64/linkage-arm64.cc
+++ b/src/compiler/arm64/linkage-arm64.cc
@@ -57,8 +57,8 @@ CallDescriptor* Linkage::GetStubCallDescriptor(
 
 
 CallDescriptor* Linkage::GetSimplifiedCDescriptor(
-    Zone* zone, int num_params, MachineRepresentation return_type,
-    const MachineRepresentation* param_types) {
+    Zone* zone, int num_params, MachineType return_type,
+    const MachineType* param_types) {
   return LinkageHelper::GetSimplifiedCDescriptor<LinkageHelperTraits>(
       zone, num_params, return_type, param_types);
 }