MLK-22259-4: mx6dlsabreauto: configs: add default mtdids and mtdparts configs

MLK-22259-4: mx6dlsabreauto: configs: add default mtdids and mtdparts configs

set the i.MX6DL default mtdids value as
"nor0=8000000.nor,nand0=gpmi-nand", nandbcb can directly write to the
nandboot partition after u-boot brings up.

=> nandbcb update $loadaddr nandboot 912384
Device nor0 not found!
current device is invalid, skip it and check the next one
device 0 offset 0x0, size 0x912384
Erasing at 0x3f00000 -- 100% complete.
NAND fw write: 0x200000 offset, 0x916000 bytes written: OK

Signed-off-by: Han Xu <han.xu@nxp.com>