The environment storage location is selectable via Kconfig. We support eMMC, SD and SPI-NOR as location for U-Boot. This adds support to store the environment in the SPI-NOR additional to the default eMMC location. Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com> Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>