Revert "[MIPS] Use hard float calling convention for managed code"

MipsMir2Lir::LockCallTemps() is broken for secondary architecture on aosp_mips64-eng.

This reverts commit a29449dcf57c57fe0876f51367985477317cc557.

Change-Id: I480ea7569d73aea7894fc0a6dd804b1135286a37
diff --git a/compiler/dex/quick/mips/codegen_mips.h b/compiler/dex/quick/mips/codegen_mips.h
index 2173253..43fbcbd 100644
--- a/compiler/dex/quick/mips/codegen_mips.h
+++ b/compiler/dex/quick/mips/codegen_mips.h
@@ -29,18 +29,15 @@
  protected:
   class InToRegStorageMipsMapper : public InToRegStorageMapper {
    public:
-    explicit InToRegStorageMipsMapper(Mir2Lir* m2l) : m2l_(m2l), cur_core_reg_(0), cur_fpu_reg_(0)
-        {}
+    explicit InToRegStorageMipsMapper(Mir2Lir* m2l) : m2l_(m2l), cur_core_reg_(0) {}
     virtual RegStorage GetNextReg(ShortyArg arg);
     virtual void Reset() OVERRIDE {
       cur_core_reg_ = 0;
-      cur_fpu_reg_ = 0;
     }
    protected:
     Mir2Lir* m2l_;
    private:
     size_t cur_core_reg_;
-    size_t cur_fpu_reg_;
   };
 
   class InToRegStorageMips64Mapper : public InToRegStorageMapper {