meta-quanta: add meta-gbs machine

The meta-gbs equipped with Nuvoton NPCM730 BMC SoC.

Tested: Build GBS image and load on the target hardware

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I23534bdf3e3d6f9dc468ea727cb24ceed8eb9dd5
5 files changed