The ifstate is already set in
enc_ifup -> enc_reset -> enc_linkstatus
The ifstate after this call is either ENCSTATE_RUNNING or ENCSTATE_UP
If ifstate is ENCSTATE_RUNNING, it would be wrong to set it to ENCSTATE_UP;
this would lead to enc_txavail never invoking the driver callback, causing
very long latencies in sending.
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>