[ch32v307] 删掉无意义的memset重载 (#6561)
[ch32v307] 删掉无意义的memset重载 (#6561)


RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread