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

(From meta-quanta rev: c679ff6a47362319a59a511d710a116ddd90ca2a)

Signed-off-by: George Hung <george.hung@quantatw.com>
Change-Id: I5b85609a5c310ce1b7dc13df867b7c230cf59c39
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/meta-quanta/meta-gbs/conf/conf-notes.txt b/meta-quanta/meta-gbs/conf/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-quanta/meta-gbs/conf/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image