This bitmask indicates which executable images this chassis can
support. This object is mandatory for all chassis.
Bit 0 is reserved.
Subsequent bits refer to the nbsCmmcSysFirmwareTable. Bit 1
corresponds to the first table entry, Bit 2 to the second entry,
and so on. A bit is set (1) if that image is appropriate for this
chassis, cleared (0) otherwise.
OCTET STRING bitmasks count the leftmost bit (MSB) as 0.
A zero length OCTET STRING indicates that the
nbsCmmcSysFirmwareTable is not supported by this agent.