[ROCm] fix bfloat16 support, test=develop (#40401)

paddle/fluid/imperative/gradient_accumulator.cc

@@ -423,7 +423,7 @@ void TensorAdd(const VarType& src, VarType* dst) {
   }
   if (data_type == framework::proto::VarType::BF16) {
     if (platform::is_gpu_place(place)) {
-#if defined(PADDLE_WITH_CUDA)
+#if defined(PADDLE_WITH_CUDA) || defined(PADDLE_WITH_HIP)
       return TensorAddImpl<platform::CUDADeviceContext, platform::bfloat16>(
           src_tensor, dst_tensor, place);
 #else