imx: imx8qm: cgtqmx8: switch to binman

Switch to use binman to pack images

Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Peng Fan <peng.fan@nxp.com>