drm/vmwgfx: Use list_move_tail instead of list_del/list_add_tail in vmwgfx_cmdbuf.c

Using list_move_tail() instead of list_del() + list_add_tail() in vmwgfx_cmdbuf.c.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210609071803.1347254-1-libaokun1@huawei.com

drivers/gpu/drm/vmwgfx/vmwgfx_cmdbuf.c

@@ -358,8 +358,7 @@ static void vmw_cmdbuf_ctx_submit(struct vmw_cmdbuf_man *man,
 			break;
 		}
 
-		list_del(&entry->list);
-		list_add_tail(&entry->list, &ctx->hw_submitted);
+		list_move_tail(&entry->list, &ctx->hw_submitted);
 		ctx->num_hw_submitted++;
 	}