sfc: don't call tx_limit_len if NIC type doesn't have one
Edward Cree authored

EF100 doesn't need to split up large DMAs.
Signed-off-by: default avatarEdward Cree <ecree@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
79de6e7c