sys/shell/nimble_netif: add list channel map cmd
sys/shell/nimble_netif: add list channel map cmd

miri64/RIOT,authmillenon/RIOT,kaspar030/RIOT,kaspar030/RIOT,jasonatran/RIOT,kaspar030/RIOT,jasonatran/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kYc0o/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,ant9000/RIOT,kaspar030/RIOT,kYc0o/RIOT,miri64/RIOT,kYc0o/RIOT,ant9000/RIOT,OTAkeys/RIOT,miri64/RIOT,RIOT-OS/RIOT,miri64/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,ant9000/RIOT,RIOT-OS/RIOT,OTAkeys/RIOT,kYc0o/RIOT,OlegHahm/RIOT,ant9000/RIOT,authmillenon/RIOT,kaspar030/RIOT,ant9000/RIOT,miri64/RIOT,jasonatran/RIOT,authmillenon/RIOT,authmillenon/RIOT,jasonatran/RIOT,OlegHahm/RIOT,OlegHahm/RIOT,jasonatran/RIOT