Update AC fail check to new DBus parameter

PFail was removed from DBus and replaced with a new parameter
in settings.  This changes the Get Chassis Status command to
check the new parameter to get the AC fail status.

Tested:
After AC cycle:
ipmitool chassis status
Last Power Event     : ac-failed

Change-Id: I019a48c1347dced5b81866ec3dcd81c5964561fd
Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
1 file changed