rootfs: add phy-access dev tool

Add quick (and dirty) phy-access tool for PHY access through
MAC.

Signed-off-by: David Andrey <david.andrey@netmodule.com>
activated getopt long option name
undo activation of getopt long option name, wrong layer
[net-snmp] Disable the PCI stuff, that will prevent snmpd from starting!
net-snmp: remove loading of IEC62439 specific extension
u-boot: update to 2013.04

Update U-Boot 2012.04 to 2013.04. Following targets are
defined:
 * ZX3-PM3
 * ZX3-Starter
 * ZE7000

Signed-off-by: David Andrey <david.andrey@netmodule.com>
kernel: add dts patch for memory size

DTS now use 512 MB as memory size

Signed-off-by: David Andrey <david.andrey@netmodule.com>