Draft: [SANTINO][DDR] Fix DDR table for 2x512MB

Setup the DDR table to access all the available RAM on Santino 2x512MB. Only 512MB was detected before this fix.

Test:

root@seco-imx6dl-santino:~# cat /proc/meminfo | grep -i memtotal
MemTotal:        1019360 kB

JIRA Reference: [CLEAOS-659]

Signed-off-by: Nicola Sparnacci nicola.sparnacci@seco.com