icorem6: Recover missing nand defconfig

nand defconfig is accidentally removed from below
commit, so recover the same.
"icorem6: Make SPL to pick suitable fdt"
(sha1: 15455a6b01d97d575afe2f494cfc9722424230c0)

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
1 file changed