MIPS: [turbofan] Also optimize unsigned division by constant.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 9ee594ef957f0f0851027a381cc2a22eb67b3c56..d500eaa8bf45f0cae032ce3ab995542a30b26523 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -593,6 +593,7 @@ class MacroAssembler: public Assembler {
   DEFINE_INSTRUCTION(Modu);
   DEFINE_INSTRUCTION(Mulh);
   DEFINE_INSTRUCTION2(Mult);
+  DEFINE_INSTRUCTION(Mulhu);
   DEFINE_INSTRUCTION2(Multu);
   DEFINE_INSTRUCTION2(Div);
   DEFINE_INSTRUCTION2(Divu);