dpdk: fix mlx4 mlx5 detection in plugin build
dpdk: fix mlx4 mlx5 detection in plugin build

Since the move to DPDK 21.02, compatibility build symbols were depreca-
ted, breaking the static linkage of the DPDK plugin to libibverbs.

Change-Id: I2fec0807e4c0eb00268618f1495af862eede9081
Type: fix
Fixes: 5f35a185d5afee2c364fe84f33922bac1a808113
Signed-off-by: Mohammed Hawari <e345ebb5fb15a590b29a075cdaf46eed42e192de@hawari.fr>

chrisy/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp