ddr: marvell: a38x: add ddr32 support

ddr: marvell: a38x: add ddr32 support

commit 32800667b375ebd1f82120da0f3479b1cf52d96d upstream.

Required changes made for 32bit ddr support.
An update is made to the topology map, according to
bus_act_mask, set in the dram_port.c

Signed-off-by: Alex Leibovich <alexl@marvell.com>
Reviewed-by: Nadav Haklai <Nadav.Haklai@cavium.com>
Reviewed-by: Kostya Porotchkin <Kostya.Porotchkin@cavium.com>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>