The logging-in device name, which is decided by the
hh3cFcPsmEnfLoginDevType object. It represents node WWN
when the value of hh3cFcPsmEnfLoginDevType is nWWN. It
represents port WWN when the value of hh3cFcPsmEnfLoginDevType
is pWWN. It represents switch WWN when the value of
hh3cFcPsmEnfLoginDevType is sWWN. It represents any device when
the value of hh3cFcPsmEnfLoginDevType is wildCard, and the value
of the instance of this object should be zero-length string.