A typo snuck in with the addition of Cudy M1800, changing
"nr7101" to "nt7101". The result is a default network config
for NR7101 without the only ethernet interface on the NR7101,
thereby soft bricking it.
Fixes: f6d394e9f2fd ("ramips: add support for Cudy M1800") Signed-off-by: Bjørn Mork <bjorn@mork.no>