net/vmxnet3: set the queue shared buffer at start

net/vmxnet3: set the queue shared buffer at start

If a reconfiguration happens, queuedesc is reallocated.  Any queues that
are preserved point to the previous queuedesc since the queues are only
configured during queue setup.  Delay configuration of the shared queue
pointers until device start when queuedesc is no longer changing.

Fixes: 8618d19b52b1 ("net/vmxnet3: reallocate shared memzone on re-config")
Cc: stable@dpdk.org
Signed-off-by: Chas Williams <chas3@att.com>
Acked-by: Shrikrishna Khare <skhare@vmware.com>