configs: colibri-imx7: Fix bad block table in flash configuration

configs: colibri-imx7: Fix bad block table in flash configuration

Make sure that the bad block table in flash is used on Colibri iMX7.
Without this configuration enabled U-Boot corrupts the bad block table
and Linux will update the table on each reboot. The corruption occurs
because if CONFIG_SYS_NAND_USE_FLASH_BBT is not set, U-boot will store
bad blocks out of band, while the Linux driver for the iMX7 will store
them in band in a bad block table.

Fixes: fd8c1fc9430 ("arm: dts: imx7: colibri: add raw NAND support")
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>
Reviewed-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>