ip-neighbor: fix debug log format output
ip-neighbor: fix debug log format output

Type: fix

Signed-off-by: luoyaozu <0bf208eeb5df0ecefd38a32d6a1efd36de179303@foxmail.com>
Change-Id: Ibfebe4da0197d1f60bf9edd3873fe1f776b680a4

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