[U-Boot] Older u-boot mangles UBI from ubinize 1.5.2

[J Mo]

It's all moot now! I accidentally wrecked my u-boot today.

I typoed "nand write ${fileaddr} ${BOOTCONFIG_nand_addr} ${0x800}"

When I meant "0x800" instead of the undefined "${0x800}", which u-boot 
translated to 0xacc0000.

I guess I'm going to find out if that JTAG header works.