Patch fix following compilation error:
../mini2440.c:33:28: error: asm/mach-types.h: No such file or directory
../mini2440.c: In function 'mini2440_devices_init':
../mini2440.c:113: error: 'MACH_TYPE_MINI2440' undeclared (first use in this function)
../mini2440.c:113: error: (Each undeclared identifier is reported only once
../mini2440.c:113: error: for each function it appears in.)

Signed-off-by: Marek Belisko <marek.belisko@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This work is mainly based on a9m2440 board implementation
from Juergen Beisert <jbe@pengutronix.de>. Functionality
was tested only running barebox from ram. Loading to flash
and booting will not work because missing lowlevel_init
functionality (lack of jtag debugger on my side ;)).

Signed-off-by: Marek Belisko <marek.belisko@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>