sky2: handle network device allocation failure

If alloc_etherdev() failed, then sky2_init_netdev will return NULL,
and sky2_probe would end up returning 0 instead of -ENOMEM.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 file changed