mpc85xx: enable NAND support for all subtargets
In subtarget p2020, there wasn't enabled nand support, and because of
that there weren't available tools from mtd-utils package, which has
utilities for NAND flash memory even though reference board, which
is the only currently supported device in p2020 subtarget has NAND [1].
All subtargets in mpc85xx has already enabled nand support, let's do it
globally.
[1] https://www.nxp.com/design/qoriq-developer-resources/p2020-reference-design-board:P2020RDB
Signed-off-by: Josef Schlehofer <[email protected]>
Josef Schlehofer