Add IPMI 2.0 ColdReset command support

* Implement reset by reboot command issued in a shell
* Work with related changes in phosphor-host-ipmid repo

Resolves openbmc/openbmc#437

Change-Id: I8143b1ee9c0d547ee47e5bd3659a5126b6e5af98
Signed-off-by: Nan Li <william.bjlinan@hotmail.com>
4 files changed