MLECO-2512: Minor improvement for helper scripts.

Python scripts 'build_default.py' and 'set_up_default_resources.py'
now allow building for non-default Ethos-U configurations: H32, H64,
H256 and Y512.

Change-Id: Iefdbf135410396c4dc0be73462644725d4b47910
diff --git a/source/use_case/vww/usecase.cmake b/source/use_case/vww/usecase.cmake
index 4005297..8bf55fc 100644
--- a/source/use_case/vww/usecase.cmake
+++ b/source/use_case/vww/usecase.cmake
@@ -31,7 +31,7 @@
     STRING)
 
 if (ETHOS_U_NPU_ENABLED)
-    set(DEFAULT_MODEL_PATH      ${DEFAULT_MODEL_DIR}/vww4_128_128_INT8_vela_${DEFAULT_NPU_CONFIG_ID}.tflite)
+    set(DEFAULT_MODEL_PATH      ${DEFAULT_MODEL_DIR}/vww4_128_128_INT8_vela_${ETHOS_U_NPU_CONFIG_ID}.tflite)
 else()
     set(DEFAULT_MODEL_PATH      ${DEFAULT_MODEL_DIR}/vww4_128_128_INT8.tflite)
 endif()