fix device

Author: Aganlengzi

python/paddle/fluid/tests/unittests/npu/test_merged_momentum_op_npu.py

@@ -261,7 +261,7 @@ def setUp(self):
  paddle.enable_static()
  self.shapes = [[3, 4], [2, 7], [5, 6], [7, 8]]
  self.seed = 10
- self.place = paddle.device.NPUPlace(0)
+ self.place = paddle.fluid.NPUPlace(0)
  self.__class__.use_npu = True
 
  def gen_rand_data(self, shapes, dtype):
@@ -314,7 +314,7 @@ def setUp(self):
  paddle.enable_static()
  self.shapes = [[3, 4], [2, 7], [5, 6], [7, 8]]
  self.seed = 10
- self.place = paddle.device.NPUPlace(0)
+ self.place = paddle.fluid.NPUPlace(0)
  self.__class__.use_npu = True
 
  def gen_rand_data(self, shapes, dtype):