The new MMU setup will need SDRAM base addresses and sizes.
For this reason convert the MMU enabled ARM boards:

- move mem setup to mem_initcall. This is early but
  still makes sure that we already have the console available
- move MMU setup in this initcall temporary as after the mmu_init will generic

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

this will automaticaly register the device to armlinux_add_dram

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Add a helper function for boards to register their memory
devices. This makes the board code smaller and also helps
getting rid of map_base and struct memory_platform_data.

And switch all of the memory to it

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

we keep struct memory_platform_data for now on we will switch off the memories
resources to struct resource

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Note: This is work in progress. Use with care.

Signed-off-by: Juergen Beisert <jbe@pengutronix.de>