uboot-kirkwood: update to 2013.10

uboot-kirkwood: update to 2013.10

Tested on:

 * Cloud Engines Pogoplug E02
 * RaidSonic ICY BOX IB-NAS62x0
 * Iomega Iconnect

Some users are avoiding to replace their bootloader, because of that add
support for second stage u-boot image. Having ubifs capable bootloader is
required in order to boot current OpenWrt trunk.

Sample ib62x0 commands for running second stage bootloader:

tftpboot 0x800000 uboot-kirkwood-ib62x0_second_stage/openwrt-kirkwood-ib62x0_second_stage-u-boot.img
bootm 0x800000

Sample ib62x0 commands for flashing second stage bootloader:

tftpboot 0x800000 uboot-kirkwood-ib62x0_second_stage/openwrt-kirkwood-ib62x0_second_stage-u-boot.img
nand erase 0x100000 0x100000 ; nand write 0x800000 0x100000 0x${filesize}
nand read 0x800000 0x100000 0x100000 ; bootm 0x800000

While at it include parallel build support, use alphabetic order of the boards
and introduce common OpenWrt configuration.

Signed-off-by: Luka Perkov <[email protected]>
Tested-by (on ib62x0): Luka Perkov <[email protected]>
Tested-by (on dockstar): Alexander Couzens <[email protected]>
Tested-by (on iconnect): Wojciech Dubowik <[email protected]>
CC: Felix Kaechele <[email protected]>
CC: Wojciech Dubowik <[email protected]>
CC: Alexander Couzens <[email protected]>
CC: Daniel Engberg <[email protected]>
CC: Imre Kaloz <[email protected]>
SVN-Revision: 39590