kwbimage: Add support for extracting images via dumpimage tool

The kwbimage library does not support extracting subimages. Implement it.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
1 file changed