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/scripts/cmake/bare-metal-sources.cmake b/scripts/cmake/bare-metal-sources.cmake
index 3fe9b1b..c797d5f 100644
--- a/scripts/cmake/bare-metal-sources.cmake
+++ b/scripts/cmake/bare-metal-sources.cmake
@@ -60,6 +60,10 @@
         "${DEFAULT_NPU_MEM_MODE}"
         STRING)
 
+    USER_OPTION(ETHOS_U_NPU_CONFIG_ID "Specifies the configuration ID for the NPU."
+        "${DEFAULT_NPU_CONFIG_ID}"
+        STRING)
+
     if (ETHOS_U_NPU_MEMORY_MODE STREQUAL Sram_Only)
 
         if (ETHOS_U_NPU_ID STREQUAL U55)