This is necessary to make second stage booting work when the register
window is already moved.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

binary.0 sets up all RAM but the address decoding isn't adapted accordingly
which makes barebox assume that there are only 512 MiB of RAM on a single
bank instead of two banks with 1 GiB each.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

Status quo is that initially a size of 64 MiB is assumed (which is also
used to determine the size of the malloc area) and then later the dtb
is fixed up with the actually available RAM which is then used.

Instead detect the real RAM size earlier and don't fixup the device tree.
The device tree is fixed up instead by generic code. This way the malloc
area is more appropriately sized and RAM detection is more similar to mach-imx
which is both nice.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>