[nrf fromtree] ipc: ipc_service: Null terminate RPMsg endpoint names#2442

nordicjm merged 1 commit intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

weeTike:ipc_rpmsg_string_null_termweeTike/sdk-zephyr:ipc_rpmsg_string_null_termCopy head branch name to clipboard