Fix name-array out-of-memory

Fix name-array out-of-memory

"struct prox_port_cfg" "names" buffer size is 64 and it will lead to
out-of-memory when do "snprintf" operation. Modify code to enlarge
buffer size to 128.

Fixes: 9a1e1e9336b3 ("Added support for multiple vlans in ipv4 vdev mode")
Cc: xavier.simonart@intel.com
Signed-off-by: Long Wu <long.wu@corigine.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Chaoyong He <chaoyong.he@corigine.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Change-Id: Iafbde578688e1a59f4b6e655e45b2d2951f36162