Support for add and get boot order

Added support for oem command add and set boot order. Also added
default boot order.

Tested: Verified this with ipmitool command

Change-Id: I4cdb7ac2c10a1815ce84da05b64e3b3a3c96feba
Signed-off-by: Vijay Khemka <vijaykhemka@fb.com>
2 files changed