global change: repace sched_xfree() to kxmm_free()

Changes:
sched_xfree() => kxmm_free()
remove garbage related APIs
remove ARCH_HAVE_GARBAGE

Cause garbage feature move to mm_heap, then don't need
garbage anymore.

Change-Id: If310790a3208155ca8ab319e8d038cb6ff92c518
Signed-off-by: ligd <liguiding@fishsemi.com>

wireless/bluetooth/bt_buf.c

@@ -453,7 +453,7 @@ void bt_buf_release(FAR struct bt_buf_s *buf)
       /* Otherwise, deallocate it. */
 
       DEBUGASSERT(buf->pool == POOL_BUFFER_DYNAMIC);
-      sched_kfree(buf);
+      kmm_free(buf);
     }
 
   wlinfo("Buffer freed: %p\n", buf);

wireless/ieee802154/ieee802154_primitive.c

@@ -409,7 +409,7 @@ void ieee802154_primitive_free(FAR struct ieee802154_primitive_s *prim)
       /* Otherwise, deallocate it. */
 
       DEBUGASSERT(priv->pool == POOL_PRIMITIVE_DYNAMIC);
-      sched_kfree(priv);
+      kmm_free(priv);
     }
 #endif
 

wireless/pktradio/pktradio_metadata.c

@@ -237,6 +237,6 @@ void pktradio_metadata_free(FAR struct pktradio_metadata_s *metadata)
       /* Otherwise, deallocate it.  We won't access the free list */
 
       nxsem_post(&g_metadata_sem);
-      sched_kfree(metadata);
+      kmm_free(metadata);
     }
 }