The Entries of hwMultiCpuDevTable.
The hwMultiCpuDevTable is indexed by hwFrameIndex, hwSlotIndex and hwMultiCpuDevIndex.
hwFrameIndex - the index of frame of the device. for example, hwFrameIndex
equals 0 in NE16.
hwSlotIndex - the slot number of the device, the MAX value varies with
different devices.
hwMultiCpuDevIndex - for the purpose of extension.