[bsp/nrf52x] support putting characters to ble host and getting characters from ble host via rtthread finsh console
[bsp/nrf52x] support putting characters to ble host and getting characters from
ble host via rtthread finsh console

Signed-off-by: chenyingchun0312 <94d3c0e146d3de7b97339d7f1849b8648666181f@163.com>

armink/rt-thread,nongxiaoming/rt-thread,nongxiaoming/rt-thread,ArdaFu/rt-thread,RT-Thread/rt-thread,ArdaFu/rt-thread,RT-Thread/rt-thread,armink/rt-thread,nongxiaoming/rt-thread,hezlog/rt-thread,hezlog/rt-thread,ArdaFu/rt-thread,hezlog/rt-thread,weety/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,nongxiaoming/rt-thread,nongxiaoming/rt-thread,geniusgogo/rt-thread,armink/rt-thread,weety/rt-thread,geniusgogo/rt-thread,armink/rt-thread,armink/rt-thread,geniusgogo/rt-thread,hezlog/rt-thread,nongxiaoming/rt-thread,weety/rt-thread,geniusgogo/rt-thread,ArdaFu/rt-thread,hezlog/rt-thread,ArdaFu/rt-thread,weety/rt-thread,RT-Thread/rt-thread,ArdaFu/rt-thread,armink/rt-thread,ArdaFu/rt-thread,RT-Thread/rt-thread,weety/rt-thread,weety/rt-thread,hezlog/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,RT-Thread/rt-thread,armink/rt-thread,geniusgogo/rt-thread,geniusgogo/rt-thread,geniusgogo/rt-thread,weety/rt-thread