meta-quanta: gbs: add kcs device and 7seg

1. The GBS's host communicates with BMC by KCS1
2. add 7seg for post code led

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: Icba425718052e4e4a2c4217813a60b3a099e04c6
3 files changed