net/vmxnet3: fix queue size changes

net/vmxnet3: fix queue size changes

If the user reconfigures the queue size, then the previously allocated
memzone may potentially be too small.  Release the memzone when a queue
is released and allocate a new one each time a queue is setup.

While here convert to rte_eth_dma_zone_reserve() which does basically
the same things as the private function.

Fixes: dfaff37fc46d ("vmxnet3: import new vmxnet3 poll mode driver implementation")
Cc: stable@dpdk.org
Signed-off-by: Chas Williams <ciwillia@brocade.com>
Acked-by: Jan Blunck <jblunck@infradead.org>
Acked-by: Shrikrishna Khare <skhare@vmware.com>