Add support for IPMI GetChassisStatus command

* Factor response to explicitly commented fields
* Add GetChassisStatus command to whilelist

Note: some fields need furture work.

Resolves openbmc/openbmc#439

Change-Id: I7a8d6bfe384f2621c157db379680921db4756fcc
Signed-off-by: Nan Li <william.bjlinan@hotmail.com>
3 files changed