fix XiZi/cortex-m4-emulator compile error from Wang_guozhu

it is OK

APP_Framework/Applications/app_test/test_spi_flash.c

@@ -1,21 +1,7 @@
 /*
- * File      : spi_flash_sfud.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2016, RT-Thread Development Team
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with this program; if not, write to the Free Software Foundation, Inc.,
- *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes

Ubiquitous/XiZi/arch/arm/Makefile

@@ -7,7 +7,7 @@ endif
 
 ifeq ($(CONFIG_BOARD_STM32F103_NANO),y)
 SRC_DIR := shared
-SRC_DIR +=cortex-m3
+SRC_DIR += cortex-m3
 endif
 
 ifeq ($(CONFIG_BOARD_STM32F407_EVB),y)
@@ -15,6 +15,11 @@ SRC_DIR := shared
 SRC_DIR += cortex-m4
 endif
 
+ifeq ($(CONFIG_BOARD_CORTEX_M4_EVB),y)
+SRC_DIR := shared
+SRC_DIR += cortex-m4
+endif
+
 ifeq ($(CONFIG_BOARD_CORTEX_M7_EVB),y)
 SRC_DIR := shared
 SRC_DIR += cortex-m7