examples/l3fwd: fix build with hash multi-lookup
examples/l3fwd: fix build with hash multi-lookup

l3fwd does not compile with HASH_MULTI_LOOKUP.
2 issues:
 * in 64d395 mask0 changed type from xmm_t to rte_xmm_t
      -> use x field from rte_xmm_t
 * in dc81eb dst_port parameter changed to uint32_t
      -> change uint16_t dst_port to uin32_t dsp_port

Fixes: dc81ebbacaeb ("lpm: extend IPv4 next hop field")
Fixes: 64d3955de1de ("examples/l3fwd: fix ARM build")

Signed-off-by: Maciej Czekaj <8d42daaa8d68ad54ca06613337e5c27633935527@caviumnetworks.com>

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