ARM: defconfig: re-run savedefconfig on multi_v* configs

This is mostly to reorder the entries as they've moved in the Kconfig
hierarchies. Doing this periodically (but not very often) simplifies
conflict resolution for new options, etc.

Link: https://lore.kernel.org/r/20191205211438.27552-2-olof@lixom.net
Signed-off-by: Olof Johansson <olof@lixom.net>