[turbofan] Re-enables the jump table emission in the mips instruction selector.

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 33064e6e42166af88df4a2aa6b8e8b9ac24840e3..e92eb9ec4ebf95260a631e64bca45b49754a97cc 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -1778,12 +1778,14 @@ void MacroAssembler::GenerateSwitchTable(Register index, size_t case_count,
     lw(at, MemOperand(at));
   } else {
     Label here;
-    BlockTrampolinePoolFor(case_count + 6);
+    BlockTrampolinePoolFor(case_count + 10);
+    push(ra);
     bal(&here);
     sll(at, index, kPointerSizeLog2);  // Branch delay slot.
     bind(&here);
     addu(at, at, ra);
-    lw(at, MemOperand(at, 4 * v8::internal::Assembler::kInstrSize));
+    pop(ra);
+    lw(at, MemOperand(at, 6 * v8::internal::Assembler::kInstrSize));
   }
   jr(at);
   nop();  // Branch delay slot nop.