This value specifies the overall condition of the Hot Plug
Slot feature.
The Hot Plug condition is set as follows:
other(1)
When Hot Plug Slots are not supported or condition is unknown.
ok(2)
If there are no hot plug slots with a condition of degraded
or failed.
degraded(3)
If there are degraded slot entries but none failed.
failed(4)
If there are failed slot entries.