MIPS64: Fix after [turbofan] Avoid unnecessary write barriers and improve code generation.

Use 64-bit add for address.

TEST=mjsunit/sparse-array.js, others.
BUG=

Review URL: https://codereview.chromium.org/1435793002

Cr-Commit-Position: refs/heads/master@{#31937}

src/compiler/mips64/code-generator-mips64.cc

@@ -241,7 +241,7 @@ class OutOfLineRecordWrite final : public OutOfLineCode {
     // and restore lr properly here if the frame was elided.
     RecordWriteStub stub(isolate(), object_, scratch0_, scratch1_,
                          EMIT_REMEMBERED_SET, save_fp_mode);
-    __ Addu(scratch1_, object_, index_);
+    __ Daddu(scratch1_, object_, index_);
     __ CallStub(&stub);
   }