marvell: armada: add extra level in marvell platform hierarchy

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>
diff --git a/docs/plat/marvell/index.rst b/docs/plat/marvell/index.rst
index 89ebdc0..0d33432 100644
--- a/docs/plat/marvell/index.rst
+++ b/docs/plat/marvell/index.rst
@@ -5,10 +5,10 @@
    :maxdepth: 1
    :caption: Contents
 
-   build
-   porting
-   misc/mvebu-a8k-addr-map
-   misc/mvebu-amb
-   misc/mvebu-ccu
-   misc/mvebu-io-win
-   misc/mvebu-iob
+   armada/build
+   armada/porting
+   armada/misc/mvebu-a8k-addr-map
+   armada/misc/mvebu-amb
+   armada/misc/mvebu-ccu
+   armada/misc/mvebu-io-win
+   armada/misc/mvebu-iob