Initial support for quick compiler on MIPS64r6.

Change-Id: I6f43027b84e4a98ea320cddb972d9cf39bf7c4f8
diff --git a/compiler/dex/quick/ralloc_util.cc b/compiler/dex/quick/ralloc_util.cc
index 67fb804..682fa28 100644
--- a/compiler/dex/quick/ralloc_util.cc
+++ b/compiler/dex/quick/ralloc_util.cc
@@ -1355,7 +1355,7 @@
     default: res = LocCReturn(); break;
   }
   Clobber(res.reg);
-  if (cu_->instruction_set == kMips) {
+  if (cu_->instruction_set == kMips || cu_->instruction_set == kMips64) {
     MarkInUse(res.reg);
   } else {
     LockTemp(res.reg);