env_nand_oob.patch

env_nand_oob.patch
This patch adds support for CFG_ENV_OFFSET_PATCHED and
CFG_ENV_OFFSET_OOB.

Both try to solve the problem of fixing the environment location in NAND flash
at compile time, which doesn't work well if the NAND flash has a bad block at
exactly that location.

CFG_ENV_OFFSET_PATCHED puts the environment in a global variable.  You can then
use the linker script to put that variable to a fixed location in the u-boot
image.  Then you can use bianry patching during the production flash process.

The idea of CFG_ENV_OFFSET_OOB is to store the environment offset in the NAND
OOB data of block 0.  We can do this in case the vendor makes a guarantee that
block 0 never is a factory-default bad block.

Signed-off-by: Harald Welte <laforge@openmoko.org>