ARM: Kirkwood: Added support for pogoplug e02 (pink/gray)

The pogoplug differs from the SheevaPlug only by a
few details, but especially in the led assignments.
This patch was tested under Gentoo Linux and is
based on dts files from Arch Linux ARM and OpenWrt.

Suggested-by: Felix Kaechele <heffer@fedoraproject.org>
Suggested-by: Oleg Rakhmanov <moonman.ca@gmail.com>
Signed-off-by: Christoph Junghans <ottxor@gentoo.org>
[Andrew Lunn <andrew@lunn.ch>: Fixed subject line]
Signed-off-by: Andrew Lunn <andrew@lunn.ch>