change namespace to fix conflict (#40164)

paddle/phi/kernels/gpu/sigmoid_cross_entropy_with_logits_grad_kernel.cu

@@ -89,7 +89,7 @@ void SigmoidCrossEntropyWithLogitsGradKernel(const Context &dev_ctx,
       reduce_dim.push_back(i);
     }
 
-    kernels::TensorReduceImpl<T, T, kps::AddFunctor, NonzeroFunctor<T>>(
+    funcs::TensorReduceImpl<T, T, kps::AddFunctor, NonzeroFunctor<T>>(
         dev_ctx,
         *counts_tensor,
         norm_tensor,

paddle/phi/kernels/gpu/sigmoid_cross_entropy_with_logits_kernel.cu

@@ -89,7 +89,7 @@ void SigmoidCrossEntropyWithLogitsKernel(const Context &dev_ctx,
       reduce_dim.push_back(i);
     }
 
-    kernels::TensorReduceImpl<T, T, kps::AddFunctor, NonzeroFunctor<T>>(
+    funcs::TensorReduceImpl<T, T, kps::AddFunctor, NonzeroFunctor<T>>(
         dev_ctx,
         *counts_tensor,
         norm_tensor,