ARC: [eznps] change busybox defconfig

This one includes:
telnetd
ftpd
ftpget
ftpput
tar understands gz/bz2

Signed-off-by: Noam Camus <noamc@ezchip.com>
ARC: [eznps] set PS1 to be EZdk

Signed-off-by: Noam Camus <noamc@ezchip.com>
ARC: [eznps] update SYSV users

Users root and default got password identical to their username
Also no getty at serial just need to press any key.

Signed-off-by: Noam Camus <noamc@ezchip.com>
ARC: [eznps] add BR2 defconfig

This is minimal configuration for EZdk

Signed-off-by: Noam Camus <noamc@ezchip.com>