MPC85xx: fix memory layout to prevent corruption during memtest
Memory regions on MPC85xx boards are incorrectly defined leading to
corruption when running memory tests. This patch updates the memory
layout of MPC85xx boards so that critical memory regions can be
correctly reserved during the memory test.
Tested on the P2020RDB and DA923RC.
Signed-off-by: Renaud Barbier <renaud.barbier@ge.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>