FH8620 BSP
Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
All rights reserved

function `rt_pin_write` is invoked by  function `can_bus_hook`, and it should to be initialized by gpio.c.
but gpio.c was not added in SConscript

enum CANBAUD was changed in components/drivers/include/drivers/can.h ,
which causes array index out of bound in bsp/stm32f10x/drivers/bxcan.c

temporarily remove RT_CAN_USING_BUS_HOOK, because there are some bugs in
bsp/stm32f10x/applications/canapp.c  function can_bus_hook

finsh_set_device is not needed since version 1.2.0

temporarily disable canapp initialization.

1. Target board: STM32F411RE-Nucleo
2. Using STM32 HAL library version 1.4.3 (STM32Cube_FW_F4_V1.10.0)

in function internal，get "geometry" form paramater "dev->user_data",  not use public variable "SDCfg"

fix the compiling warning when enable DFS.

解决因为缺少RT_DFS_ELM_CODE_PAGE 导致scons无法正确配置工程文件系统代码页问题。

Fix the undefined symbol NRF_SRAM_END
Configure SRAM part for Heap

Add interrupt enter and leave