get_device_usage called PciDevicesManager list with an incorrect
parameter. This change appears to have been a merge error in commit
876844f0fd.
That commit also removed the class_id attr from the DeviceUsage class.
That attr has been added back.
Change-Id: I9ae47a8ff4d4a3e5c6ea671a9f1be848045c3b02
Signed-off-by: David Sullivan <david.sullivan@windriver.com>
Closes-Bug: 1792463