[turbofan] Get rid of DefineAsDoubleRegister() and friends.

src/compiler/instruction-selector.cc

Index: src/compiler/instruction-selector.cc
diff --git a/src/compiler/instruction-selector.cc b/src/compiler/instruction-selector.cc
index e950b4a16ca5649dcc5caa5f307f868862c86c03..6db55423b072fdbccf371df6e04a56eb8f0f7f48 100644
--- a/src/compiler/instruction-selector.cc
+++ b/src/compiler/instruction-selector.cc
@@ -737,7 +737,7 @@ void InstructionSelector::VisitInt64LessThanOrEqual(Node* node) {
 void InstructionSelector::VisitTruncateFloat64ToInt32(Node* node) {
   OperandGenerator g(this);
   Emit(kArchTruncateDoubleToI, g.DefineAsRegister(node),
-       g.UseDoubleRegister(node->InputAt(0)));
+       g.UseRegister(node->InputAt(0)));
 }