This is an i.MX25 base board with only NAND
so it uses nand_spl to boot.
Signed-off-by: NJohn Rigby <jcrigby@gmail.com>

Tune configuration, add support for (redundant) environment in NAND.
Signed-off-by: NWolfgang Denk <wd@denx.de>
Acked-by: NWolfgang Denk <wd@denx.de>
CC: Fred Fan <fanyefeng@gmail.com>
CC: Tom <Tom.Rix@windriver.com>