vty: cosmetic: use VTY_IPV4_CMD in 'bind-ip' / 'remote-ip'
vty: cosmetic: use VTY_IPV4_CMD in 'bind-ip' / 'remote-ip'

Change-Id: I8e44f771cbd03629c066bc24c3186997761f93f1

osmocom/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx,osmocom/osmo-trx