Converting all parallel for lambda to functor in order to prevent kernel duplication name error; adding tensorConcatinationOp backend for sycl.

unsupported/Eigen/CXX11/src/Tensor/TensorEvalTo.h

@@ -41,6 +41,9 @@ struct traits<TensorEvalToOp<XprType, MakePointer_> >
     // Intermediate typedef to workaround MSVC issue.
     typedef MakePointer_<T> MakePointerT;
     typedef typename MakePointerT::Type Type;
+    typedef typename MakePointerT::RefType RefType;
+
+
   };
 };
 
@@ -117,7 +120,7 @@ struct TensorEvaluator<const TensorEvalToOp<ArgType, MakePointer_>, Device>
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const XprType& op() const {
     return m_op;
   }
-  
+
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE ~TensorEvaluator() {
   }