sunxi: extend R528/T113-s3/D1(s) DRAM initialisation

sunxi: extend R528/T113-s3/D1(s) DRAM initialisation

The T113-s4 SoC is using the same die as the T113-s3, but comes with
256MiB of co-packaged DRAM. Besides the doubled size, the DRAM chip
seems to be connected slightly differently, which requires to use a
different pin remapping.

Extend the DRAM initialisation code to add support for the T113-S4 aka
T113M4020DC0 by checking the SoC's CHIPID, which is stored in the first
word of the SID efuses.

Signed-off-by: Lukas Schmid <lukas.schmid@netcube.li>
Tested-by: John Watts <contact@jookia.org>
Reviewed-by: John Watts <contact@jookia.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>