Commit 7b88e62f (ARM: OMAP1: Use generic
map_io, init_early and init_irq) changed omap1 to use generic map_io.

Looks like I missed one board though. Fix this by adding a custom
map_io for Amstrad E3.
Reported-by: NAaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: NTony Lindgren <tony@atomide.com>