mm/mm_heap: add mm_delaylist to mm_heap_s struct

Change-Id: I2ffaec5557bf2dd2021baa6cda84bb5318425caa
Signed-off-by: ligd <liguiding@fishsemi.com>

mm/mm_heap/mm_initialize.c

@@ -175,6 +175,12 @@ void mm_initialize(FAR struct mm_heap_s *heap, FAR void *heapstart,
   heap->mm_nregions = 0;
 #endif
 
+#ifdef __KERNEL__
+  /* Initialize mm_delaylist */
+
+  heap->mm_delaylist.flink = NULL;
+#endif
+
   /* Initialize the node array */
 
   memset(heap->mm_nodelist, 0, sizeof(struct mm_freenode_s) * MM_NNODES);