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This commit introduces 32-bit DDR topology map initialization.
For that purpose a new DDR32 build flag is added, with
according documentation update.

Change-Id: I169ff358c2923afd984e27bc126dc551dcaefc01
Signed-off-by: Alex Leibovich <alexl@marvell.com>

This commit is a preparation for upcoming support for OcteonTX and
OcteonTX2 product families. Armada platform related files (docs,
plat, include/plat) are moved to the new "armada" sub-folder.

Change-Id: Icf03356187078ad6a2e56c9870992be3ca4c9655
Signed-off-by: Grzegorz Jaszczyk <jaz@semihalf.com>
Signed-off-by: Marcin Wojtas <mw@semihalf.com>