As it gets killed, in SIGINT signal handler, device is not stopped
and closed. In virtio's case, vector assignment in the KVM is not
deassigned.
This patch will invoke dev_stop() and dev_close() in signal handler.
Fixes: d7937e2e3d12 ("power: initial import")
Signed-off-by: Jianfeng Tan <jianfeng.tan@intel.com>
Tested-by: Lei Yao <lei.a.yao@intel.com>