Get the correct present countdown value when watchdog is stopped
Get the correct present countdown value when watchdog is stopped

The timeRemaining property in watchdog service will return 0
if the watchdog is not started.

Tested By:
ipmitool raw 0x6 0x24 0x0 0x0 0x0 0x0 0xa 0xb
ipmitool mc watchdog get

Change-Id: I27992f25a0e2c75df398ec5e2702b467365e9a32
Signed-off-by: Yong Li <88803ad297965b86eb60f441534f52cc3a2b6651@linux.intel.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid