Implement IPMI ACPI set/get commands

The IPMI ACPI set/get power state commands are provided
to allow system software to tell a controller the present
ACPI power state of the system.

This is an independent setting that may not necessarily match the
actual power state of the system.

The commands are used to enable the reporting of the power state,
it does not control or change the power state.

The ACPI status will be saved into flash by settings manager.

Tested By:
Set ACPI:
ipmitool -H <IP>  -P 0penBmc -I lanplus raw 0x06 0x06 0x86 0x83
Get ACPI:
ipmitool -H <IP>  -P 0penBmc -I lanplus raw 0x06 0x07

Change-Id: I6d00c0aec931b98d6691d7c4a54698e08d317aa4
Signed-off-by: Yong Li <yong.b.li@linux.intel.com>
3 files changed