inetutils: not use auto-detected login for telnetd

Below error appears as login was auto-detected by default:
| telnetd: /usr/bin/login -p -h 192.168.2.1 : No such file or directory.
| Connection closed by foreign host.

Signed-off-by: Ting Liu <ting.liu@freescale.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>