Fix timer for NPU&XPU (#8261)

* Fix timer for NPU&XPU

* Fix NPU/XPU timer

Author: KB-Ding

paddlenlp/trainer/plugins/timer.py

@@ -32,15 +32,15 @@ def __init__(self, name):
     def start(self):
         """Start the timer."""
         assert not self.started_, f"{self.name} timer has already started"
-        if "gpu" in paddle.device.get_device():
+        if "cpu" not in paddle.device.get_device():
             paddle.device.synchronize()
         self.start_time = time.time()
         self.started_ = True
 
     def stop(self):
         """Stop the timers."""
         assert self.started_, f"{self.name} timer is not started."
-        if "gpu" in paddle.device.get_device():
+        if "cpu" not in paddle.device.get_device():
             paddle.device.synchronize()
         self.elapsed_ += time.time() - self.start_time
         self.started_ = False