[MLBEDSW-3690] Refactor Softmax

Move operator generation code to common functions.

Signed-off-by: Fredrik Svedberg <fredrik.svedberg@arm.com>
Change-Id: I02e185fd793a96ae435fa7d235c9d1e97f388a03
diff --git a/ethosu/vela/pass_packing.py b/ethosu/vela/pass_packing.py
index 59376a8..ea2eaa4 100644
--- a/ethosu/vela/pass_packing.py
+++ b/ethosu/vela/pass_packing.py
@@ -21,9 +21,9 @@
 from .debug_database import DebugDatabase
 from .nn_graph import Pass
 from .nn_graph import PassPlacement
-from .operation import create_avgpool_nop
 from .operation import NpuBlockType
 from .operation import Op
+from .operation_util import create_avgpool_nop
 from .tensor import TensorPurpose