Description: This object defines the upgrade or download device objects,when do upgrade operation
one or more device can be selected as operate objects. The data format defined as
following:

---------------------------------
|  slot   |   olt   |    onu    |   
---------------------------------
  1byte      1byte      8byte

All these 10 bytes used as bit map for device selecting, when selected set the 
according bit to 1, else set to 0

The bit sequence in each used from low to high:

For example:
slot:0000 0101, select slot 1 and 3, dont select slot 2 and 4 and others(reserved)
olt: 0000 0011  select olt(pon port) 1 and 2, dont select others(reserved)
onu: byte[0] map to onuId 1~8; byte[1] map to onuId 9~16,...,
     byte[7] map to onuId 56~63
     Bit map in byte[0]: b0~b7 map to onuId1~onuId8, etc.