If the DC is in shutdown state, the set link state function will return
an error.  Since this is not a failure in this state, make sure to
only call set link state if the DC is on.
Reviewed-by: NEaswar Hariharan <easwar.hariharan@intel.com>
Signed-off-by: NMichael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: NDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>