Revert "Disable USE_HIMEM_IF_AVAILABLE"

This reverts commit d40d5ba0f6021938b7a3e04837cc3502e6adfab9.

code/include/defines.h

@@ -21,7 +21,7 @@
 
 
     // use himem //https://github.com/jomjol/AI-on-the-edge-device/issues/1842
-    //#define USE_HIMEM_IF_AVAILABLE
+    #define USE_HIMEM_IF_AVAILABLE
 
     /* Uncomment this to generate task list with stack sizes using the /heap handler
         PLEASE BE AWARE: The following CONFIG parameters have to to be set in