be2net: fixes in ethtool selftest

> add missing separator between items in ethtool self_test array
> fix reporting of test resluts when link is down and
  when selftest command fails.

From: Suresh R <suresh.reddy@emulex.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>