Set the environment variable 'fdtfile' depending on ENET workaround detection. The function tqma6_get_fdt_configuration is implemented to be reusable for configuration detection in multi-DTB FIT image and therefore returns the devicetree name without the '.dtb' ending. Set fdtfile only if CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG is enabled and it is currently unset. The model string is loaded from the device tree variant. Therefore, the overriding of the model string is being removed. Signed-off-by: Paul Gerber <Paul.Gerber@tq-group.com> Signed-off-by: Markus Niebel <Markus.Niebel@ew.tq-group.com> Signed-off-by: Max Merchel <Max.Merchel@ew.tq-group.com>