regions_mm: Use static initialization of the vmh_list list head

A macro was used to statically initialize the vmh_list list head. This
allowed to resign from calling a function whose only task was to initialize
the list header. This function was removed as no needed anymore.

Signed-off-by: Adrian Warecki <adrian.warecki@intel.com>

zephyr/lib/regions_mm.c

@@ -6,11 +6,10 @@
  */
 
 #include <zephyr/init.h>
-
 #include <sof/lib/regions_mm.h>
 
 /* list of vmh_heap objects created */
-static struct list_item vmh_list;
+static struct list_item vmh_list = LIST_INIT(vmh_list);
 
 /**
  * @brief Initialize new heap
@@ -677,23 +676,6 @@ void vmh_get_default_heap_config(const struct sys_mm_drv_region *region,
 	}
 }
 
-/**
- * @brief Initialization of static objects in virtual heaps API
- *
- * This will initialize lists of allocations and physical mappings.
- *
- * @param unused Variable is unused - needed by arch to clear warning.
- *
- * @retval Returns 0 on success
- */
-static int virtual_heaps_init(void)
-{
-	list_init(&vmh_list);
-	return 0;
-}
-
-SYS_INIT(virtual_heaps_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
-
 /**
  * @brief Gets pointer to already created heap identified by
  * provided attribute.