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
diff --git a/meta-gbs/conf/conf-notes.txt b/meta-gbs/conf/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-gbs/conf/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image