At this moment p2020rdb has broken images, because NOR memory connected
to eLBC bus isn't detected.
In 642b1e8dbed7 linux tree commit, config dependencies of MTD_PHYSMAP_OF
was changed and now MTD_PHYSMAP is required.
This patch adds MTD_PHYSMAP option to kernel config in p2020 subtarget
and fix booting of p2020rdb.
Fixes: 13b1db795f ("mpc85xx: add support for kernel 5.4")
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
