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>

plat/marvell/common/marvell_common.mk → plat/marvell/armada/common/marvell_common.mk

@@ -3,11 +3,11 @@
 # SPDX-License-Identifier:     BSD-3-Clause
 # https://spdx.org/licenses
 
-MARVELL_PLAT_BASE		:= plat/marvell
-MARVELL_PLAT_INCLUDE_BASE	:= include/plat/marvell
+MARVELL_PLAT_BASE		:= plat/marvell/armada
+MARVELL_PLAT_INCLUDE_BASE	:= include/plat/marvell/armada
 
-include $(MARVELL_PLAT_BASE)/version.mk
-include $(MARVELL_PLAT_BASE)/marvell.mk
+include plat/marvell/version.mk
+include plat/marvell/marvell.mk
 
 VERSION_STRING			+=(Marvell-${SUBVERSION})