ubnt,bullet-m and ubnt,rocket-m targets support only single Ethernet
port, therefore disable creation of WAN zone and interfaces for them,
as their intended purpose is a wireless bridge. This aligns the
configuration with one found in ar71xx target.
ubnt,nano-m target is kept as is, being a two-port device.
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
tplink,tl-mr3020-v1|\
tplink,tl-mr3040-v2|\
tplink,tl-wr703n|\
+ ubnt,bullet-m|\
+ ubnt,rocket-m|\
ubnt,unifiac-lite|\
ubnt,unifiac-mesh|\
ubnt,unifi)