[NPU] support fp16 of input for api pow (#31871)

python/paddle/fluid/layers/nn.py

@@ -9525,8 +9525,8 @@ def pow(x, factor=1.0, name=None):
             y_2 = fluid.layers.pow(x, factor=factor_tensor)
             # y_2 is x^{3.0}
     """
-    check_variable_and_dtype(x, 'x', ['int32', 'int64', 'float32', 'float64'],
-                             'pow')
+    check_variable_and_dtype(
+        x, 'x', ['int32', 'int64', 'float16', 'float32', 'float64'], 'pow')
 
     helper = LayerHelper('pow', **locals())
     inputs = {'X': x}