These boards have not been converted to CONFIG_DM_PCI by the deadline and is
also missing conversion to CONFIG_DM.  Remove them.  As this is the only
ARCH_MPC8555 platform left, remove that support as well.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: NTom Rini <trini@konsulko.com>