Fix bug in code for setting dpdk interface descriptors (VPP-552)
Fix bug in code for setting dpdk interface descriptors (VPP-552)

Change-Id: I6401b745eeb402ec980e86dc179b774d341c4764
Signed-off-by: Juraj Sloboda <00a3e8e35b8aa66e4b3ee1ab4852a3d7bce0da23@cisco.com>

milanlenco/vpp,chrisy/vpp,vpp-dev/vpp,FDio/vpp,FDio/vpp,chrisy/vpp,FDio/vpp,FDio/vpp,vpp-dev/vpp,vpp-dev/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,GabrielGanne/vpp-flowtable,GabrielGanne/vpp-flowtable,FDio/vpp,chrisy/vpp,vpp-dev/vpp,milanlenco/vpp,GabrielGanne/vpp-flowtable,FDio/vpp,milanlenco/vpp,milanlenco/vpp,FDio/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,milanlenco/vpp,chrisy/vpp,GabrielGanne/vpp-flowtable,chrisy/vpp,vpp-dev/vpp,vpp-dev/vpp,FDio/vpp,vpp-dev/vpp,milanlenco/vpp