[turbofan] Float32Abs and Float64Abs are supported by all backends.

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

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index afddd0a5089a2c2704e9285f5ef6fc4023054fd3..b4e811f0f8a45051fc5a5935e018893b6e504bd1 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -1058,9 +1058,7 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
 // static
 MachineOperatorBuilder::Flags
 InstructionSelector::SupportedMachineOperatorFlags() {
-  MachineOperatorBuilder::Flags flags =
-      MachineOperatorBuilder::kFloat32Abs | MachineOperatorBuilder::kFloat64Abs;
-
+  MachineOperatorBuilder::Flags flags = MachineOperatorBuilder::kNoFlags;
   if ((IsMipsArchVariant(kMips32r2) || IsMipsArchVariant(kMips32r6)) &&
       IsFp64Mode()) {
     flags |= MachineOperatorBuilder::kFloat64RoundDown |