Changes

linux/knl: don't forget to ignore the mscache if L3 is ignored
Forgotten in commit 0106e7124b00866bedcceea01ded88d770eff76a
   linux/knl: complete rework of heuristics to guess cluster/memory
mode
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

lstopo/draw: fix the displaying of multiple NUMA nodes as normal
children order
When "--children-order plain" was specified, all children (including
memory) are placed by the main call to place__children() but it wasn't
called if only memory_arity was > 0. That caused all memory children to
be placed as the first child on the left.
Only matter when there are >1 NUMA nodes in the same parent.
Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>