ARM: multi_v7_defconfig: enable MMP platforms

Marvell MMP/PXA/MMP2 platforms seem to be excluded from the defconfig
for no good reasons. Enable the DT-based boards along with modules for
their peripherals.

Link: https://lore.kernel.org/r/20191017145705.2867950-1-lkundrak@v3.sk


Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Olof Johansson <olof@lixom.net>