net: fix build with pedantic for L2TPv2 definitions
net: fix build with pedantic for L2TPv2 definitions

Build is broken on RHEL7 following introduction of this new protocol.

Fixes: 3a929df1f286 ("ethdev: support L2TPv2 and PPP procotol")

Signed-off-by: David Marchand <f28529695cfa9e3e1eb84e7072aa626af4abb18e@redhat.com>
Tested-by: Raslan Darawsheh <18fd192a829ab99382a9c480ddb6085edf3e8489@nvidia.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk