[kernel] code and comments cleanup

[components]: utilities: ymodem: Add ymodem send protocol and ry_sy application.

Use "ry" to receive files and use "sy file_path" to
send files. Default console uart and you can choose
any other uart if you want.
Signed-off-by: NSteven Liu <steven.liu@rock-chips.com>

add stm32l4r5-st-nucleo BSP

[bsp][stm32] fix the hardware timer issue

sync

[bsp/stm32] update eclipse project.

[BSP] move libcpu/mips/x1000 to bsp/x1000/cpu

[components][sfud] update sfud options.

[BSP/stm32f427-robomaster-a] add SD card suport

[tools] remove unused path when using scons target eclipse.

增加音频设备驱动

修改stm32驱动库

fix spelling mistake in the comments of shell.c

1.修改drv_flash_l4.c文件中stm32_onchip_flash定义的blk_size字段,由原来2048改为FLASH_PAGE_SIZE,以增强芯片适应性.
2.修改drv_usbd.c文件中stm_usbd_register函数,增加支持RT_USING_DEVICE_OPS配置.

[bsp/stm32] Add DMAMUX support for stm32l4+.

Signed-off-by: armink <armink.ztl@gmail.com>

增加GPIO中断进入退出保护

Fix eclipse

增加GPIO中断进入退出保护

[bsp/stm32] Update uart_config.h

【修复】修复sal判断internet连接的隐藏bug

1、当前判断网卡是否连接Internet是通过连接rtt-thread的服务器来判断的，
2、这个月开始好像服务器挂了，不响应请求
3、这里超时用的2000秒，导致sys workqueue被卡死在这里了

sync

[Device/I2C] Chang debug message print way to ulog