X87: [turbofan] Make Float32Neg and Float64Neg mandatory operators.

src/compiler/x87/instruction-selector-x87.cc

Index: src/compiler/x87/instruction-selector-x87.cc
diff --git a/src/compiler/x87/instruction-selector-x87.cc b/src/compiler/x87/instruction-selector-x87.cc
index bd93fd92cb576da291505ff3e6536153cd3f2ed6..ec91b5a25a6609e681406343e90a4ee5beaad62f 100644
--- a/src/compiler/x87/instruction-selector-x87.cc
+++ b/src/compiler/x87/instruction-selector-x87.cc
@@ -1723,8 +1723,7 @@ void InstructionSelector::VisitAtomicStore(Node* node) {
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
   MachineOperatorBuilder::Flags flags =
-      MachineOperatorBuilder::kWord32ShiftIsSafe |
-      MachineOperatorBuilder::kFloat32Neg | MachineOperatorBuilder::kFloat64Neg;
+      MachineOperatorBuilder::kWord32ShiftIsSafe;
   if (CpuFeatures::IsSupported(POPCNT)) {
     flags |= MachineOperatorBuilder::kWord32Popcnt;
   }