Add POWER8 Barreleye README

Added a POWER8 Barreleye README with a line about POWER8 Barreleye
no longer being a supported machine. This can up updated in the
future if POWER8 Barreleye becomes supported again. Calling this
"POWER8 Barreleye" to differentiate from the POWER
Barreleye/Zaius system.

Change-Id: Ia5738cc7a34f96657307322cd924ad71d9e3cc40
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/meta-barreleye/README.md b/meta-barreleye/README.md
new file mode 100644
index 0000000..66660f7
--- /dev/null
+++ b/meta-barreleye/README.md
@@ -0,0 +1,6 @@
+POWER8 Barreleye
+================
+
+This is the POWER8 Barreleye machine layer.
+
+POWER8 Barreleye is no longer a supported machine.