Below are the patches to make flash-kernel work:
Create the following file, /usr/share/flash-kernel/db/pogo_e02.db
Machine: Pogoplug E02
Kernel-Flavors: kirkwood
U-Boot-Kernel-Address: 0x00008000
U-Boot-Initrd-Address: 0x0
Boot-Kernel-Path: /boot/uImage
Boot-Initrd-Path: /boot/uInitrd
Required-Packages: u-boot-tools
Bootloader-sets-root: no