Following discussions on the mailing list [1] and since nobody stood up to
implement the necessary cleanups, here is the ivshmem integration removal.

There is not much to say about this patch, a lot of code is being removed.
The default configuration file for packet_ordering example is replaced with
the "native" x86 file.
The only tricky part is in eal_memory with the memseg index stuff.

More cleanups can be done after this but will come in subsequent patchsets.

[1]: http://dpdk.org/ml/archives/dev/2016-June/040844.html

Signed-off-by: David Marchand <redacted>

Acked-by: Anatoly  Burakov <redacted>