use-reset: listen to the chassis signal instead of host

Inherited from the dbus-sensors, the `powerMatch` for PowerState::on was
incorrectly pointed to the Host status.

That is a mismatch for the definition of x86-power-control:
https://github.com/openbmc/x86-power-control/blob/master/src/power_control.cpp#L515-L537

More specifically, `PowerState::checkForWarmReset` should be considered
as part of PowerState::On, instead of PowerState::Off.

The ChassisState of x86-power-control is more close to reflect the
desired hardware signal (PowerOk signal).
https://github.com/openbmc/x86-power-control/blob/master/src/power_control.cpp#L538-L559

The only delta is the `waitForSIOPowerGood` which is still considered as
Chassis.PowerState.Off, which happens after the `Event::powerOKAssert`.
https://github.com/openbmc/x86-power-control/blob/master/src/power_control.cpp#L1781

However, the SIO is not enabled on the target platform

Google-Bug-Id: 316465377
Tested: tested against a warmreboot machine and confirmed no usb reset
Change-Id: If441bdfb79f5262bbbc60235f3447ab3e0aae816
Signed-off-by: Hao Jiang <jianghao@google.com>
1 file changed