RT-Thread/rt-thread: https://github.com/RT-Thread/rt-thread.git @ 921e6057aa11e52eafcbcdabbb5765359ba2f286

réplica de https://github-proxy.rt-thread.io/RT-Thread/rt-thread.git

malongwei 5fb6cb8b41 修复ringblk_buf在不使用动态内存时报错的问题		%!s(int64=4) %!d(string=hai) anos
..
drivers	84db60ecfa [sdio] remove rt_mmcsd_blk_init	%!s(int64=4) %!d(string=hai) anos
ipc	5fb6cb8b41 修复ringblk_buf在不使用动态内存时报错的问题	%!s(int64=4) %!d(string=hai) anos
rtdevice.h	d94be14df5 [serial] 增加serial_v2版本的框架和基于stm32的串口驱动	%!s(int64=4) %!d(string=hai) anos