ip: align the name of the 'nohandler' stat

ip: align the name of the 'nohandler' stat

Before:

    RX: bytes  packets  errors  dropped missed  mcast
    8848233056 8548168  0       0       0       0
    RX errors: length   crc     frame   fifo    overrun   nohandler
               0        0       0       0       0       101
    TX: bytes  packets  errors  dropped carrier collsns compressed
    1142925945 4683483  0       0       0       0       101
    TX errors: aborted  fifo   window heartbeat transns
               0        0       0       0       14

After:

    RX: bytes  packets  errors  dropped missed  mcast
    8848297833 8548461  0       0       0       0
    RX errors: length   crc     frame   fifo    overrun nohandler
               0        0       0       0       0       101
    TX: bytes  packets  errors  dropped carrier collsns compressed
    1143049820 4683865  0       0       0       0       101
    TX errors: aborted  fifo   window heartbeat transns
               0        0       0       0       14

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David Ahern <dsahern@kernel.org>