meta-quanta: s6q: create basic machine

Initial introduction of Quanta S6Q family equipped with Aspeed 2600 BMC
SoC.

Tested:
 1. Build Quanta S6Q board and load on the target hardware.
 2. Ensure that BMC boots to console.

Change-Id: Ia16d5fd6e38e2191908c0bec44cb412be254a433
Signed-off-by: P.K.Lee <p.k.lee@quantatw.com>
diff --git a/meta-quanta/meta-s6q/conf/conf-notes.txt b/meta-quanta/meta-s6q/conf/conf-notes.txt
new file mode 100644
index 0000000..9b3c01a
--- /dev/null
+++ b/meta-quanta/meta-s6q/conf/conf-notes.txt
@@ -0,0 +1,2 @@
+Common targets are:
+     obmc-phosphor-image