The logging-in device name, which is decided by the
hpnicfFcPsmEnfLoginDevType object. It represents node WWN
when the value of hpnicfFcPsmEnfLoginDevType is nWWN. It
represents port WWN when the value of hpnicfFcPsmEnfLoginDevType
is pWWN. It represents switch WWN when the value of
hpnicfFcPsmEnfLoginDevType is sWWN. It represents any device when
the value of hpnicfFcPsmEnfLoginDevType is wildCard, and the value
of the instance of this object should be zero-length string.