fix pool grad

mindspore/core/ops/grad/pool_grad.cc

@@ -55,8 +55,8 @@ void PoolGrad::Init(const std::vector<int64_t> &kernel_size, const std::vector<i
 }
 
 void PoolGrad::set_kernel_size(const std::vector<int64_t> &kernel_size) {
-  std::vector<int64_t> k_size = _grad_check_vector(kSize, kernel_size, this->name());
-  this->AddAttr(kSize, MakeValue(k_size));
+  std::vector<int64_t> k_size = _grad_check_vector(kKernelSize, kernel_size, this->name());
+  this->AddAttr(kKernelSize, MakeValue(k_size));
 }
 
 void PoolGrad::set_strides(const std::vector<int64_t> &strides) {
@@ -75,7 +75,7 @@ void PoolGrad::set_format(const Format &format) {
 }
 
 std::vector<int64_t> PoolGrad::get_kernel_size() const {
-  auto value_ptr = GetAttr(kSize);
+  auto value_ptr = GetAttr(kKernelSize);
   return GetValue<std::vector<int64_t>>(value_ptr);
 }