[turbofan] remove redundant '& 0x1F' for shifts.

src/compiler/arm64/instruction-selector-arm64.cc

Index: src/compiler/arm64/instruction-selector-arm64.cc
diff --git a/src/compiler/arm64/instruction-selector-arm64.cc b/src/compiler/arm64/instruction-selector-arm64.cc
index aba7eb0189e1bb960624f8f7a4e2ba47a505b222..56eb9e589b90d58431077e8b4e93ac309555cdd7 100644
--- a/src/compiler/arm64/instruction-selector-arm64.cc
+++ b/src/compiler/arm64/instruction-selector-arm64.cc
@@ -1414,7 +1414,8 @@ InstructionSelector::SupportedMachineOperatorFlags() {
   return MachineOperatorBuilder::kFloat64Floor |
          MachineOperatorBuilder::kFloat64Ceil |
          MachineOperatorBuilder::kFloat64RoundTruncate |
-         MachineOperatorBuilder::kFloat64RoundTiesAway;
+         MachineOperatorBuilder::kFloat64RoundTiesAway |
+         MachineOperatorBuilder::kWord32ShiftIsSafe;
 }
 }  // namespace compiler
 }  // namespace internal