fix bug

Author: bowang007

py/torch_tensorrt/dynamo/conversion/impl/unary/ops.py

@@ -9,7 +9,6 @@
     cast_trt_tensor,
     get_trt_tensor,
 )
-from torch_tensorrt.dynamo.conversion.impl.elementwise import div
 from torch_tensorrt.dynamo.conversion.impl.unary.base import convert_unary
 from torch_tensorrt.fx.types import TRTTensor
 
@@ -70,7 +69,9 @@ def log2(
 
     ln2 = 0.693147180559945309
 
-    return div(ctx, target, source_ir, f"{name}_div", log_layer_output, ln2)
+    return impl.elementwise.div(
+        ctx, target, source_ir, f"{name}_div", log_layer_output, ln2
+    )
 
 
 def sqrt(