fb-ipmi-oem: yosemitev2: Add Ipmi implementation for read post codes

Added implementation to handle read post code BIC request from host to BMC and
send the response back to host.

TESTED : Built Facebook YosemiteV2 images and loaded on the target hardware.
Verified all the host's postcodes in BMC.

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Change-Id: Iee9a224b381db5ab9e244b9ae2999a602e520a36
2 files changed