uboot-imx

igep003x: UBIize

Convert IGEP board to use UBI volumes for U-Boot, its environment and
kernel. With exception of first four sectors read by SoC BootROM whole
NAND is UBI managed.

Signed-off-by: Ladislav Michl <ladis@linux-mips.org>
Reviewed-by: Heiko Schocher<hs@denx.de>
Tested-by: Pau Pajuelo <ppajuel@gmail.com>