mx6sxsabresd: imximage.cfg: Handle the CONFIG_SECURE_BOOT case

Secure boot is not enabled in mx6sxsabresd imximage.cfg, add support
for it.

Signed-off-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
1 file changed