cmd: fix neighbor get with the interface name
cmd: fix neighbor get with the interface name

fix the regression of commit 7fc795694637c06be52cad97cf7397db0c7431fb

Signed-off-by: FUJITA Tomonori <93dac1fe9c4b2a3957982200319981492ad4976e@lab.ntt.co.jp>

fujita/gobgp,j-kato/gobgp,tamihiro/gobgp,osrg/gobgp,a16/gobgp,osrg/gobgp,osrg/gobgp,fujita/gobgp,ishidawataru/gobgp,a16/gobgp,ishidawataru/gobgp,ishidawataru/gobgp,fujita/gobgp,a16/gobgp,osrg/gobgp,j-kato/gobgp,a16/gobgp,Dipsingh/gobgp,tamihiro/gobgp,a16/gobgp,tamihiro/gobgp,Dipsingh/gobgp,Dipsingh/gobgp,j-kato/gobgp,a16/gobgp,tamihiro/gobgp,a16/gobgp,fujita/gobgp